./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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.02.i.cil-2.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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:37:17,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:37:17,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:37:17,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:37:17,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:37:17,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:37:17,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:37:17,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:37:17,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:37:17,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:37:17,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:37:17,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:37:17,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:37:17,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:37:17,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:37:17,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:37:17,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:37:17,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:37:17,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:37:17,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:37:17,418 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:37:17,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:37:17,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:37:17,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:37:17,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:37:17,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:37:17,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:37:17,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:37:17,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:37:17,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:37:17,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:37:17,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:37:17,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:37:17,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:37:17,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:37:17,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:37:17,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:37:17,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:37:17,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:37:17,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:37:17,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:37:17,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:37:17,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:37:17,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:37:17,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:37:17,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:37:17,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:37:17,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:37:17,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:37:17,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:37:17,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:37:17,451 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:37:17,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:37:17,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:37:17,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:37:17,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:37:17,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:37:17,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:37:17,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:37:17,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:37:17,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:37:17,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:37:17,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:37:17,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:37:17,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:37:17,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:37:17,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:37:17,455 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:37:17,455 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:37:17,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:37:17,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2022-07-13 11:37:17,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:37:17,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:37:17,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:37:17,687 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:37:17,688 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:37:17,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2022-07-13 11:37:17,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4358f50a1/84d4d46de50644cd82da82418ece9adf/FLAGd44e8f6e7 [2022-07-13 11:37:18,216 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:37:18,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2022-07-13 11:37:18,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4358f50a1/84d4d46de50644cd82da82418ece9adf/FLAGd44e8f6e7 [2022-07-13 11:37:18,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4358f50a1/84d4d46de50644cd82da82418ece9adf [2022-07-13 11:37:18,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:37:18,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:37:18,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:37:18,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:37:18,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:37:18,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:37:18" (1/1) ... [2022-07-13 11:37:18,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d72fd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:18, skipping insertion in model container [2022-07-13 11:37:18,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:37:18" (1/1) ... [2022-07-13 11:37:18,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:37:18,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:37:18,879 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.02.i.cil-2.c[72502,72515] [2022-07-13 11:37:18,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:37:18,906 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:37:19,004 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.02.i.cil-2.c[72502,72515] [2022-07-13 11:37:19,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:37:19,033 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:37:19,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19 WrapperNode [2022-07-13 11:37:19,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:37:19,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:37:19,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:37:19,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:37:19,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,104 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 782 [2022-07-13 11:37:19,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:37:19,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:37:19,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:37:19,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:37:19,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:37:19,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:37:19,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:37:19,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:37:19,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (1/1) ... [2022-07-13 11:37:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:37:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:37:19,196 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) [2022-07-13 11:37:19,202 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 [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:37:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:37:19,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:37:19,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:37:19,393 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:37:19,394 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:37:19,407 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:37:22,023 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-13 11:37:22,024 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-13 11:37:22,024 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:37:22,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:37:22,032 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:37:22,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:37:22 BoogieIcfgContainer [2022-07-13 11:37:22,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:37:22,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:37:22,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:37:22,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:37:22,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:37:18" (1/3) ... [2022-07-13 11:37:22,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58364e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:37:22, skipping insertion in model container [2022-07-13 11:37:22,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:37:19" (2/3) ... [2022-07-13 11:37:22,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58364e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:37:22, skipping insertion in model container [2022-07-13 11:37:22,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:37:22" (3/3) ... [2022-07-13 11:37:22,047 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2022-07-13 11:37:22,057 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:37:22,057 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:37:22,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:37:22,098 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@6603d4ed, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a9b8123 [2022-07-13 11:37:22,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:37:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 11:37:22,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:22,112 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, 1] [2022-07-13 11:37:22,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2022-07-13 11:37:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:22,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020305837] [2022-07-13 11:37:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:22,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:22,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020305837] [2022-07-13 11:37:22,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020305837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:22,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:22,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701804742] [2022-07-13 11:37:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:22,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:22,608 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:23,942 INFO L93 Difference]: Finished difference Result 406 states and 687 transitions. [2022-07-13 11:37:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-13 11:37:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:23,953 INFO L225 Difference]: With dead ends: 406 [2022-07-13 11:37:23,953 INFO L226 Difference]: Without dead ends: 246 [2022-07-13 11:37:23,955 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 [2022-07-13 11:37:23,957 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 411 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 11:37:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-13 11:37:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 175. [2022-07-13 11:37:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.6091954022988506) internal successors, (280), 174 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 280 transitions. [2022-07-13 11:37:23,993 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 280 transitions. Word has length 47 [2022-07-13 11:37:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:23,994 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 280 transitions. [2022-07-13 11:37:23,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 280 transitions. [2022-07-13 11:37:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:37:23,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:23,996 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, 1, 1] [2022-07-13 11:37:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:37:23,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829262, now seen corresponding path program 1 times [2022-07-13 11:37:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:23,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263451815] [2022-07-13 11:37:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:24,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:24,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263451815] [2022-07-13 11:37:24,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263451815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:24,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:24,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182414956] [2022-07-13 11:37:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:24,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:24,130 INFO L87 Difference]: Start difference. First operand 175 states and 280 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:26,138 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 [] [2022-07-13 11:37:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:26,364 INFO L93 Difference]: Finished difference Result 368 states and 587 transitions. [2022-07-13 11:37:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-13 11:37:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:26,366 INFO L225 Difference]: With dead ends: 368 [2022-07-13 11:37:26,366 INFO L226 Difference]: Without dead ends: 203 [2022-07-13 11:37:26,367 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 [2022-07-13 11:37:26,367 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 22 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:26,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 439 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-13 11:37:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-13 11:37:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6162162162162161) internal successors, (299), 185 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 299 transitions. [2022-07-13 11:37:26,379 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 299 transitions. Word has length 48 [2022-07-13 11:37:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:26,380 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 299 transitions. [2022-07-13 11:37:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 299 transitions. [2022-07-13 11:37:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 11:37:26,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:26,381 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, 1, 1] [2022-07-13 11:37:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:37:26,382 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1875534592, now seen corresponding path program 1 times [2022-07-13 11:37:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:26,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275937244] [2022-07-13 11:37:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:26,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:26,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:26,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275937244] [2022-07-13 11:37:26,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275937244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:26,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:26,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:26,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625499739] [2022-07-13 11:37:26,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:26,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:26,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:26,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:26,569 INFO L87 Difference]: Start difference. First operand 186 states and 299 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) [2022-07-13 11:37:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:27,415 INFO L93 Difference]: Finished difference Result 368 states and 586 transitions. [2022-07-13 11:37:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:27,416 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 [2022-07-13 11:37:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:27,417 INFO L225 Difference]: With dead ends: 368 [2022-07-13 11:37:27,418 INFO L226 Difference]: Without dead ends: 203 [2022-07-13 11:37:27,418 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 [2022-07-13 11:37:27,419 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 24 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:27,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 441 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:37:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-13 11:37:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-13 11:37:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6108108108108108) internal successors, (298), 185 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 298 transitions. [2022-07-13 11:37:27,426 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 298 transitions. Word has length 61 [2022-07-13 11:37:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:27,427 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 298 transitions. [2022-07-13 11:37:27,427 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) [2022-07-13 11:37:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 298 transitions. [2022-07-13 11:37:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:37:27,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:27,432 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, 1, 1] [2022-07-13 11:37:27,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:37:27,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1839351473, now seen corresponding path program 1 times [2022-07-13 11:37:27,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:27,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414782891] [2022-07-13 11:37:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:27,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:27,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414782891] [2022-07-13 11:37:27,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414782891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:27,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982201104] [2022-07-13 11:37:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:27,558 INFO L87 Difference]: Start difference. First operand 186 states and 298 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) [2022-07-13 11:37:29,576 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 [] [2022-07-13 11:37:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:29,773 INFO L93 Difference]: Finished difference Result 367 states and 584 transitions. [2022-07-13 11:37:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:29,774 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 [2022-07-13 11:37:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:29,775 INFO L225 Difference]: With dead ends: 367 [2022-07-13 11:37:29,775 INFO L226 Difference]: Without dead ends: 202 [2022-07-13 11:37:29,775 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 [2022-07-13 11:37:29,776 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 28 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:29,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-13 11:37:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2022-07-13 11:37:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6054054054054054) internal successors, (297), 185 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 297 transitions. [2022-07-13 11:37:29,783 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 297 transitions. Word has length 62 [2022-07-13 11:37:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:29,783 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 297 transitions. [2022-07-13 11:37:29,783 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) [2022-07-13 11:37:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 297 transitions. [2022-07-13 11:37:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:37:29,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:29,784 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, 1, 1] [2022-07-13 11:37:29,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:37:29,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1630821317, now seen corresponding path program 1 times [2022-07-13 11:37:29,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412393642] [2022-07-13 11:37:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:29,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412393642] [2022-07-13 11:37:29,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412393642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:29,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:29,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491119987] [2022-07-13 11:37:29,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:29,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:29,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:29,902 INFO L87 Difference]: Start difference. First operand 186 states and 297 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) [2022-07-13 11:37:31,915 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 [] [2022-07-13 11:37:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:32,113 INFO L93 Difference]: Finished difference Result 367 states and 583 transitions. [2022-07-13 11:37:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:32,113 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 [2022-07-13 11:37:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:32,114 INFO L225 Difference]: With dead ends: 367 [2022-07-13 11:37:32,115 INFO L226 Difference]: Without dead ends: 202 [2022-07-13 11:37:32,115 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 [2022-07-13 11:37:32,116 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 26 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:32,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-13 11:37:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2022-07-13 11:37:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6) internal successors, (296), 185 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 296 transitions. [2022-07-13 11:37:32,122 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 296 transitions. Word has length 62 [2022-07-13 11:37:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:32,122 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 296 transitions. [2022-07-13 11:37:32,122 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) [2022-07-13 11:37:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 296 transitions. [2022-07-13 11:37:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:37:32,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:32,123 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, 1, 1] [2022-07-13 11:37:32,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:37:32,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash 509961732, now seen corresponding path program 1 times [2022-07-13 11:37:32,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233362580] [2022-07-13 11:37:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:32,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:32,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233362580] [2022-07-13 11:37:32,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233362580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:32,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:32,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:32,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63123458] [2022-07-13 11:37:32,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:32,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:32,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:32,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:32,208 INFO L87 Difference]: Start difference. First operand 186 states and 296 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) [2022-07-13 11:37:34,215 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 [] [2022-07-13 11:37:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:34,406 INFO L93 Difference]: Finished difference Result 366 states and 581 transitions. [2022-07-13 11:37:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:34,406 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 [2022-07-13 11:37:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:34,407 INFO L225 Difference]: With dead ends: 366 [2022-07-13 11:37:34,407 INFO L226 Difference]: Without dead ends: 201 [2022-07-13 11:37:34,408 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 [2022-07-13 11:37:34,408 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 19 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 445 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 [2022-07-13 11:37:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 445 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-13 11:37:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 186. [2022-07-13 11:37:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5945945945945945) internal successors, (295), 185 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 295 transitions. [2022-07-13 11:37:34,413 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 295 transitions. Word has length 62 [2022-07-13 11:37:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:34,413 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 295 transitions. [2022-07-13 11:37:34,413 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) [2022-07-13 11:37:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 295 transitions. [2022-07-13 11:37:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:37:34,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:34,413 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, 1, 1] [2022-07-13 11:37:34,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:37:34,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1144939844, now seen corresponding path program 1 times [2022-07-13 11:37:34,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:34,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168863713] [2022-07-13 11:37:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:34,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168863713] [2022-07-13 11:37:34,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168863713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:34,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:34,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506906508] [2022-07-13 11:37:34,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:34,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:34,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:34,514 INFO L87 Difference]: Start difference. First operand 186 states and 295 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) [2022-07-13 11:37:36,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:36,651 INFO L93 Difference]: Finished difference Result 364 states and 578 transitions. [2022-07-13 11:37:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:36,652 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 [2022-07-13 11:37:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:36,653 INFO L225 Difference]: With dead ends: 364 [2022-07-13 11:37:36,653 INFO L226 Difference]: Without dead ends: 199 [2022-07-13 11:37:36,654 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 [2022-07-13 11:37:36,654 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 19 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:36,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:37:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-13 11:37:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-13 11:37:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5891891891891892) internal successors, (294), 185 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2022-07-13 11:37:36,664 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 62 [2022-07-13 11:37:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:36,666 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2022-07-13 11:37:36,666 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) [2022-07-13 11:37:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2022-07-13 11:37:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 11:37:36,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:36,668 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, 1, 1] [2022-07-13 11:37:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:37:36,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1652438455, now seen corresponding path program 1 times [2022-07-13 11:37:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:36,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540245399] [2022-07-13 11:37:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540245399] [2022-07-13 11:37:36,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540245399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:36,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:36,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917765622] [2022-07-13 11:37:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:36,752 INFO L87 Difference]: Start difference. First operand 186 states and 294 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) [2022-07-13 11:37:37,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:38,050 INFO L93 Difference]: Finished difference Result 364 states and 577 transitions. [2022-07-13 11:37:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:38,051 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 [2022-07-13 11:37:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:38,052 INFO L225 Difference]: With dead ends: 364 [2022-07-13 11:37:38,052 INFO L226 Difference]: Without dead ends: 199 [2022-07-13 11:37:38,052 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 [2022-07-13 11:37:38,053 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 22 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:38,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 11:37:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-13 11:37:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-13 11:37:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5837837837837838) internal successors, (293), 185 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2022-07-13 11:37:38,057 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 63 [2022-07-13 11:37:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:38,057 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2022-07-13 11:37:38,057 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) [2022-07-13 11:37:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2022-07-13 11:37:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 11:37:38,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:38,058 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, 1, 1] [2022-07-13 11:37:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:37:38,058 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:38,058 INFO L85 PathProgramCache]: Analyzing trace with hash -848424362, now seen corresponding path program 1 times [2022-07-13 11:37:38,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:38,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16565561] [2022-07-13 11:37:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16565561] [2022-07-13 11:37:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16565561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:38,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:38,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784281338] [2022-07-13 11:37:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:38,148 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:40,163 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 [] [2022-07-13 11:37:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:40,336 INFO L93 Difference]: Finished difference Result 364 states and 576 transitions. [2022-07-13 11:37:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-13 11:37:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:40,337 INFO L225 Difference]: With dead ends: 364 [2022-07-13 11:37:40,337 INFO L226 Difference]: Without dead ends: 199 [2022-07-13 11:37:40,337 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 [2022-07-13 11:37:40,338 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 20 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 449 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 [2022-07-13 11:37:40,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-13 11:37:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-13 11:37:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5783783783783785) internal successors, (292), 185 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 292 transitions. [2022-07-13 11:37:40,342 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 292 transitions. Word has length 64 [2022-07-13 11:37:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:40,342 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 292 transitions. [2022-07-13 11:37:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 292 transitions. [2022-07-13 11:37:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:37:40,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:40,342 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, 1, 1] [2022-07-13 11:37:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:37:40,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2026506290, now seen corresponding path program 1 times [2022-07-13 11:37:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:40,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982890993] [2022-07-13 11:37:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:40,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:40,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982890993] [2022-07-13 11:37:40,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982890993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:40,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:40,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474481703] [2022-07-13 11:37:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:40,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:40,422 INFO L87 Difference]: Start difference. First operand 186 states and 292 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:42,427 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 [] [2022-07-13 11:37:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:42,592 INFO L93 Difference]: Finished difference Result 354 states and 562 transitions. [2022-07-13 11:37:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-13 11:37:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:42,593 INFO L225 Difference]: With dead ends: 354 [2022-07-13 11:37:42,593 INFO L226 Difference]: Without dead ends: 189 [2022-07-13 11:37:42,593 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 [2022-07-13 11:37:42,594 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 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 [2022-07-13 11:37:42,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-13 11:37:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-07-13 11:37:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.572972972972973) internal successors, (291), 185 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 291 transitions. [2022-07-13 11:37:42,598 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 291 transitions. Word has length 65 [2022-07-13 11:37:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:42,598 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 291 transitions. [2022-07-13 11:37:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 291 transitions. [2022-07-13 11:37:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:37:42,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:42,599 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, 1, 1] [2022-07-13 11:37:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:37:42,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1546297802, now seen corresponding path program 1 times [2022-07-13 11:37:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:42,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059465156] [2022-07-13 11:37:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:42,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059465156] [2022-07-13 11:37:42,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059465156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:42,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:42,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117948413] [2022-07-13 11:37:42,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:42,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:42,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:42,675 INFO L87 Difference]: Start difference. First operand 186 states and 291 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:44,687 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 [] [2022-07-13 11:37:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:44,972 INFO L93 Difference]: Finished difference Result 465 states and 733 transitions. [2022-07-13 11:37:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-13 11:37:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:44,974 INFO L225 Difference]: With dead ends: 465 [2022-07-13 11:37:44,974 INFO L226 Difference]: Without dead ends: 298 [2022-07-13 11:37:44,974 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 [2022-07-13 11:37:44,975 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 111 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:44,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 312 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:37:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-13 11:37:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 228. [2022-07-13 11:37:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.6255506607929515) internal successors, (369), 227 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 369 transitions. [2022-07-13 11:37:44,979 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 369 transitions. Word has length 65 [2022-07-13 11:37:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:44,980 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 369 transitions. [2022-07-13 11:37:44,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 369 transitions. [2022-07-13 11:37:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 11:37:44,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:44,981 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, 1, 1] [2022-07-13 11:37:44,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:37:44,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash 632591508, now seen corresponding path program 1 times [2022-07-13 11:37:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:44,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549678550] [2022-07-13 11:37:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:45,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:45,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549678550] [2022-07-13 11:37:45,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549678550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:45,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:45,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297470] [2022-07-13 11:37:45,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:45,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:45,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:45,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:45,086 INFO L87 Difference]: Start difference. First operand 228 states and 369 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) [2022-07-13 11:37:46,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:47,109 INFO L93 Difference]: Finished difference Result 544 states and 881 transitions. [2022-07-13 11:37:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:47,110 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 93 [2022-07-13 11:37:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:47,112 INFO L225 Difference]: With dead ends: 544 [2022-07-13 11:37:47,112 INFO L226 Difference]: Without dead ends: 337 [2022-07-13 11:37:47,113 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 [2022-07-13 11:37:47,113 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:47,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 314 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:37:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-13 11:37:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 260. [2022-07-13 11:37:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.6447876447876448) internal successors, (426), 259 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 426 transitions. [2022-07-13 11:37:47,120 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 426 transitions. Word has length 93 [2022-07-13 11:37:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:47,122 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 426 transitions. [2022-07-13 11:37:47,122 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) [2022-07-13 11:37:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 426 transitions. [2022-07-13 11:37:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 11:37:47,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:47,123 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, 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] [2022-07-13 11:37:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:37:47,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1221146161, now seen corresponding path program 1 times [2022-07-13 11:37:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82718057] [2022-07-13 11:37:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82718057] [2022-07-13 11:37:47,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82718057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:47,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:47,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776187114] [2022-07-13 11:37:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:47,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:47,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:47,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:47,228 INFO L87 Difference]: Start difference. First operand 260 states and 426 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) [2022-07-13 11:37:49,235 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 [] [2022-07-13 11:37:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:49,603 INFO L93 Difference]: Finished difference Result 613 states and 1000 transitions. [2022-07-13 11:37:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:49,603 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 105 [2022-07-13 11:37:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:49,605 INFO L225 Difference]: With dead ends: 613 [2022-07-13 11:37:49,605 INFO L226 Difference]: Without dead ends: 374 [2022-07-13 11:37:49,606 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 [2022-07-13 11:37:49,606 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 111 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:49,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 318 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:37:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-13 11:37:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 303. [2022-07-13 11:37:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.6622516556291391) internal successors, (502), 302 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 502 transitions. [2022-07-13 11:37:49,615 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 502 transitions. Word has length 105 [2022-07-13 11:37:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:49,616 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 502 transitions. [2022-07-13 11:37:49,616 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) [2022-07-13 11:37:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 502 transitions. [2022-07-13 11:37:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 11:37:49,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:49,620 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:37:49,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:37:49,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1500161074, now seen corresponding path program 1 times [2022-07-13 11:37:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:49,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256330173] [2022-07-13 11:37:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 11:37:49,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:49,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256330173] [2022-07-13 11:37:49,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256330173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:49,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:49,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987971143] [2022-07-13 11:37:49,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:49,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:49,744 INFO L87 Difference]: Start difference. First operand 303 states and 502 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) [2022-07-13 11:37:51,750 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 [] [2022-07-13 11:37:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:52,118 INFO L93 Difference]: Finished difference Result 697 states and 1149 transitions. [2022-07-13 11:37:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:52,119 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 106 [2022-07-13 11:37:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:52,121 INFO L225 Difference]: With dead ends: 697 [2022-07-13 11:37:52,121 INFO L226 Difference]: Without dead ends: 415 [2022-07-13 11:37:52,121 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 [2022-07-13 11:37:52,122 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 136 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:52,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 11:37:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-13 11:37:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 319. [2022-07-13 11:37:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.650943396226415) internal successors, (525), 318 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 525 transitions. [2022-07-13 11:37:52,129 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 525 transitions. Word has length 106 [2022-07-13 11:37:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:52,129 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 525 transitions. [2022-07-13 11:37:52,130 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) [2022-07-13 11:37:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 525 transitions. [2022-07-13 11:37:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 11:37:52,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:52,131 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, 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] [2022-07-13 11:37:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:37:52,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2144263610, now seen corresponding path program 1 times [2022-07-13 11:37:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995777728] [2022-07-13 11:37:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:37:52,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:52,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995777728] [2022-07-13 11:37:52,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995777728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:52,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:52,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:52,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591099757] [2022-07-13 11:37:52,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:52,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:52,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:52,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:52,221 INFO L87 Difference]: Start difference. First operand 319 states and 525 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:54,227 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 [] [2022-07-13 11:37:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:54,423 INFO L93 Difference]: Finished difference Result 661 states and 1092 transitions. [2022-07-13 11:37:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-13 11:37:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:54,425 INFO L225 Difference]: With dead ends: 661 [2022-07-13 11:37:54,425 INFO L226 Difference]: Without dead ends: 363 [2022-07-13 11:37:54,425 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 [2022-07-13 11:37:54,426 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 35 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:54,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 461 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-13 11:37:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2022-07-13 11:37:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6529411764705881) internal successors, (562), 340 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 562 transitions. [2022-07-13 11:37:54,432 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 562 transitions. Word has length 106 [2022-07-13 11:37:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:54,432 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 562 transitions. [2022-07-13 11:37:54,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 562 transitions. [2022-07-13 11:37:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-13 11:37:54,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:54,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:37:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:37:54,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1195785078, now seen corresponding path program 1 times [2022-07-13 11:37:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:54,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563883033] [2022-07-13 11:37:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 11:37:54,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563883033] [2022-07-13 11:37:54,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563883033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:54,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:54,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:54,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346378552] [2022-07-13 11:37:54,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:54,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:54,522 INFO L87 Difference]: Start difference. First operand 341 states and 562 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) [2022-07-13 11:37:56,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:56,397 INFO L93 Difference]: Finished difference Result 731 states and 1193 transitions. [2022-07-13 11:37:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:56,397 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 107 [2022-07-13 11:37:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:56,399 INFO L225 Difference]: With dead ends: 731 [2022-07-13 11:37:56,399 INFO L226 Difference]: Without dead ends: 411 [2022-07-13 11:37:56,399 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 [2022-07-13 11:37:56,400 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 135 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:56,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 11:37:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-07-13 11:37:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 341. [2022-07-13 11:37:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.638235294117647) internal successors, (557), 340 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 557 transitions. [2022-07-13 11:37:56,405 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 557 transitions. Word has length 107 [2022-07-13 11:37:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:56,405 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 557 transitions. [2022-07-13 11:37:56,406 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) [2022-07-13 11:37:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 557 transitions. [2022-07-13 11:37:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 11:37:56,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:56,406 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:37:56,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:37:56,407 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash 240959469, now seen corresponding path program 1 times [2022-07-13 11:37:56,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:56,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581792595] [2022-07-13 11:37:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:56,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:37:56,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581792595] [2022-07-13 11:37:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581792595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:56,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:56,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:56,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281846471] [2022-07-13 11:37:56,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:56,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:56,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:56,489 INFO L87 Difference]: Start difference. First operand 341 states and 557 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:58,494 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 [] [2022-07-13 11:37:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:58,789 INFO L93 Difference]: Finished difference Result 730 states and 1182 transitions. [2022-07-13 11:37:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-13 11:37:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:58,802 INFO L225 Difference]: With dead ends: 730 [2022-07-13 11:37:58,802 INFO L226 Difference]: Without dead ends: 410 [2022-07-13 11:37:58,803 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 [2022-07-13 11:37:58,803 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 140 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:58,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:37:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-13 11:37:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-13 11:37:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6205882352941177) internal successors, (551), 340 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 551 transitions. [2022-07-13 11:37:58,809 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 551 transitions. Word has length 120 [2022-07-13 11:37:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:58,809 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 551 transitions. [2022-07-13 11:37:58,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 551 transitions. [2022-07-13 11:37:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 11:37:58,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:58,811 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:37:58,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:37:58,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1953173121, now seen corresponding path program 1 times [2022-07-13 11:37:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:58,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650458239] [2022-07-13 11:37:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:58,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:37:58,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:58,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650458239] [2022-07-13 11:37:58,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650458239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:58,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:58,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524231154] [2022-07-13 11:37:58,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:58,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:58,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:58,892 INFO L87 Difference]: Start difference. First operand 341 states and 551 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:00,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:38:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:00,418 INFO L93 Difference]: Finished difference Result 730 states and 1170 transitions. [2022-07-13 11:38:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-13 11:38:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:00,419 INFO L225 Difference]: With dead ends: 730 [2022-07-13 11:38:00,419 INFO L226 Difference]: Without dead ends: 410 [2022-07-13 11:38:00,420 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 [2022-07-13 11:38:00,420 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 138 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:00,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 11:38:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-13 11:38:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-13 11:38:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6029411764705883) internal successors, (545), 340 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 545 transitions. [2022-07-13 11:38:00,426 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 545 transitions. Word has length 120 [2022-07-13 11:38:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:00,426 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 545 transitions. [2022-07-13 11:38:00,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 545 transitions. [2022-07-13 11:38:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 11:38:00,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:00,427 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, 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] [2022-07-13 11:38:00,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:38:00,427 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1985043260, now seen corresponding path program 1 times [2022-07-13 11:38:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339293622] [2022-07-13 11:38:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-13 11:38:00,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339293622] [2022-07-13 11:38:00,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339293622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:00,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:00,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:00,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433943763] [2022-07-13 11:38:00,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:00,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:00,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:00,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:00,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:00,507 INFO L87 Difference]: Start difference. First operand 341 states and 545 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:02,513 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 [] [2022-07-13 11:38:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:02,692 INFO L93 Difference]: Finished difference Result 679 states and 1090 transitions. [2022-07-13 11:38:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-13 11:38:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:02,694 INFO L225 Difference]: With dead ends: 679 [2022-07-13 11:38:02,694 INFO L226 Difference]: Without dead ends: 359 [2022-07-13 11:38:02,694 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 [2022-07-13 11:38:02,695 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 35 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 469 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 [2022-07-13 11:38:02,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-13 11:38:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-07-13 11:38:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6) internal successors, (544), 340 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 544 transitions. [2022-07-13 11:38:02,700 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 544 transitions. Word has length 120 [2022-07-13 11:38:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:02,700 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 544 transitions. [2022-07-13 11:38:02,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 544 transitions. [2022-07-13 11:38:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-13 11:38:02,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:02,701 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:02,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:38:02,701 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1586861309, now seen corresponding path program 1 times [2022-07-13 11:38:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:02,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694467881] [2022-07-13 11:38:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:38:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:02,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694467881] [2022-07-13 11:38:02,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694467881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:02,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:02,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308643421] [2022-07-13 11:38:02,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:02,815 INFO L87 Difference]: Start difference. First operand 341 states and 544 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:04,820 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 [] [2022-07-13 11:38:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:05,020 INFO L93 Difference]: Finished difference Result 679 states and 1088 transitions. [2022-07-13 11:38:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-13 11:38:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:05,021 INFO L225 Difference]: With dead ends: 679 [2022-07-13 11:38:05,021 INFO L226 Difference]: Without dead ends: 359 [2022-07-13 11:38:05,022 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 [2022-07-13 11:38:05,022 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 39 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 469 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 [2022-07-13 11:38:05,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-13 11:38:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-07-13 11:38:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5970588235294119) internal successors, (543), 340 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 543 transitions. [2022-07-13 11:38:05,028 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 543 transitions. Word has length 121 [2022-07-13 11:38:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:05,028 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 543 transitions. [2022-07-13 11:38:05,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 543 transitions. [2022-07-13 11:38:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-13 11:38:05,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:05,030 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:05,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 11:38:05,030 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1735358010, now seen corresponding path program 1 times [2022-07-13 11:38:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:05,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504076173] [2022-07-13 11:38:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:38:05,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:05,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504076173] [2022-07-13 11:38:05,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504076173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:05,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:05,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968885848] [2022-07-13 11:38:05,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:05,129 INFO L87 Difference]: Start difference. First operand 341 states and 543 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:07,136 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 [] [2022-07-13 11:38:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:07,416 INFO L93 Difference]: Finished difference Result 730 states and 1154 transitions. [2022-07-13 11:38:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-07-13 11:38:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:07,417 INFO L225 Difference]: With dead ends: 730 [2022-07-13 11:38:07,417 INFO L226 Difference]: Without dead ends: 410 [2022-07-13 11:38:07,418 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 [2022-07-13 11:38:07,418 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 135 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:07,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-13 11:38:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-13 11:38:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5794117647058823) internal successors, (537), 340 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 537 transitions. [2022-07-13 11:38:07,424 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 537 transitions. Word has length 122 [2022-07-13 11:38:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:07,424 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 537 transitions. [2022-07-13 11:38:07,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 537 transitions. [2022-07-13 11:38:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-13 11:38:07,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:07,425 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:07,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:38:07,426 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2093537762, now seen corresponding path program 1 times [2022-07-13 11:38:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:07,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769605279] [2022-07-13 11:38:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 11:38:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769605279] [2022-07-13 11:38:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769605279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:07,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:07,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:07,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208644094] [2022-07-13 11:38:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:07,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:07,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:07,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:07,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:07,516 INFO L87 Difference]: Start difference. First operand 341 states and 537 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,521 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 [] [2022-07-13 11:38:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:09,715 INFO L93 Difference]: Finished difference Result 669 states and 1061 transitions. [2022-07-13 11:38:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-13 11:38:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:09,716 INFO L225 Difference]: With dead ends: 669 [2022-07-13 11:38:09,717 INFO L226 Difference]: Without dead ends: 349 [2022-07-13 11:38:09,717 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 [2022-07-13 11:38:09,718 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 28 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:09,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 483 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-13 11:38:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2022-07-13 11:38:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.576470588235294) internal successors, (536), 340 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 536 transitions. [2022-07-13 11:38:09,723 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 536 transitions. Word has length 123 [2022-07-13 11:38:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:09,723 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 536 transitions. [2022-07-13 11:38:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2022-07-13 11:38:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-13 11:38:09,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:09,725 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:09,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:38:09,725 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1960687741, now seen corresponding path program 1 times [2022-07-13 11:38:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142826364] [2022-07-13 11:38:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 11:38:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:09,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142826364] [2022-07-13 11:38:09,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142826364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:09,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:38:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547920249] [2022-07-13 11:38:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:09,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:38:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:38:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:38:09,813 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:09,833 INFO L93 Difference]: Finished difference Result 975 states and 1552 transitions. [2022-07-13 11:38:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:38:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-13 11:38:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:09,836 INFO L225 Difference]: With dead ends: 975 [2022-07-13 11:38:09,836 INFO L226 Difference]: Without dead ends: 655 [2022-07-13 11:38:09,836 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 [2022-07-13 11:38:09,837 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 134 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:09,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 550 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:38:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-07-13 11:38:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-07-13 11:38:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.584097859327217) internal successors, (1036), 654 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1036 transitions. [2022-07-13 11:38:09,850 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1036 transitions. Word has length 127 [2022-07-13 11:38:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:09,850 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1036 transitions. [2022-07-13 11:38:09,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1036 transitions. [2022-07-13 11:38:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-13 11:38:09,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:09,852 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:09,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:38:09,852 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:09,852 INFO L85 PathProgramCache]: Analyzing trace with hash -88700101, now seen corresponding path program 1 times [2022-07-13 11:38:09,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192806690] [2022-07-13 11:38:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:09,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:38:09,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:09,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192806690] [2022-07-13 11:38:09,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192806690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:09,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:09,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:38:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064191912] [2022-07-13 11:38:09,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:09,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:38:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:38:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:38:09,948 INFO L87 Difference]: Start difference. First operand 655 states and 1036 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2022-07-13 11:38:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:09,970 INFO L93 Difference]: Finished difference Result 1562 states and 2482 transitions. [2022-07-13 11:38:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:38:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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 [2022-07-13 11:38:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:09,973 INFO L225 Difference]: With dead ends: 1562 [2022-07-13 11:38:09,974 INFO L226 Difference]: Without dead ends: 928 [2022-07-13 11:38:09,975 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 [2022-07-13 11:38:09,976 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:09,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 428 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:38:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-07-13 11:38:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-07-13 11:38:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.581445523193096) internal successors, (1466), 927 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1466 transitions. [2022-07-13 11:38:09,990 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1466 transitions. Word has length 127 [2022-07-13 11:38:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:09,991 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1466 transitions. [2022-07-13 11:38:09,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2022-07-13 11:38:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1466 transitions. [2022-07-13 11:38:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 11:38:09,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:09,992 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:09,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:38:09,993 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash 859220644, now seen corresponding path program 1 times [2022-07-13 11:38:09,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:09,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132396391] [2022-07-13 11:38:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 11:38:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:10,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132396391] [2022-07-13 11:38:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132396391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:10,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:10,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:38:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77888951] [2022-07-13 11:38:10,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:10,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:38:10,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:38:10,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:38:10,069 INFO L87 Difference]: Start difference. First operand 928 states and 1466 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2022-07-13 11:38:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:10,097 INFO L93 Difference]: Finished difference Result 1862 states and 2944 transitions. [2022-07-13 11:38:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:38:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 128 [2022-07-13 11:38:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:10,100 INFO L225 Difference]: With dead ends: 1862 [2022-07-13 11:38:10,100 INFO L226 Difference]: Without dead ends: 955 [2022-07-13 11:38:10,101 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 [2022-07-13 11:38:10,101 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:10,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 400 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:38:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-07-13 11:38:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 955. [2022-07-13 11:38:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.5733752620545074) internal successors, (1501), 954 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1501 transitions. [2022-07-13 11:38:10,119 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1501 transitions. Word has length 128 [2022-07-13 11:38:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:10,119 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1501 transitions. [2022-07-13 11:38:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2022-07-13 11:38:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1501 transitions. [2022-07-13 11:38:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 11:38:10,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:10,122 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:10,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 11:38:10,122 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1282639834, now seen corresponding path program 1 times [2022-07-13 11:38:10,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:10,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863363459] [2022-07-13 11:38:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 11:38:10,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:10,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863363459] [2022-07-13 11:38:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863363459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:10,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:10,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:38:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159557121] [2022-07-13 11:38:10,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:38:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:38:10,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:38:10,194 INFO L87 Difference]: Start difference. First operand 955 states and 1501 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:10,208 INFO L93 Difference]: Finished difference Result 1891 states and 2980 transitions. [2022-07-13 11:38:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:38:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-13 11:38:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:10,211 INFO L225 Difference]: With dead ends: 1891 [2022-07-13 11:38:10,211 INFO L226 Difference]: Without dead ends: 957 [2022-07-13 11:38:10,212 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 [2022-07-13 11:38:10,213 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:10,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:38:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-07-13 11:38:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2022-07-13 11:38:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.5721757322175731) internal successors, (1503), 956 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1503 transitions. [2022-07-13 11:38:10,227 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1503 transitions. Word has length 128 [2022-07-13 11:38:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:10,227 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1503 transitions. [2022-07-13 11:38:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1503 transitions. [2022-07-13 11:38:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-13 11:38:10,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:10,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:10,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 11:38:10,230 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1581011726, now seen corresponding path program 1 times [2022-07-13 11:38:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:10,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70161150] [2022-07-13 11:38:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 211 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-13 11:38:10,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70161150] [2022-07-13 11:38:10,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70161150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:38:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606538136] [2022-07-13 11:38:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:10,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:38:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:38:10,348 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) [2022-07-13 11:38:10,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:38:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 11:38:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:38:10,993 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:38:10,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-13 11:38:11,025 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:38:11,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:38:11,044 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:38:11,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-13 11:38:11,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:38:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 212 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 11:38:11,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:38:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 11:38:11,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606538136] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:38:11,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:38:11,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-13 11:38:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626644573] [2022-07-13 11:38:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:11,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:38:11,227 INFO L87 Difference]: Start difference. First operand 957 states and 1503 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) [2022-07-13 11:38:13,233 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 [] [2022-07-13 11:38:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:13,524 INFO L93 Difference]: Finished difference Result 2165 states and 3381 transitions. [2022-07-13 11:38:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:13,524 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 191 [2022-07-13 11:38:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:13,527 INFO L225 Difference]: With dead ends: 2165 [2022-07-13 11:38:13,527 INFO L226 Difference]: Without dead ends: 1231 [2022-07-13 11:38:13,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:38:13,529 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 97 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 421 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-07-13 11:38:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1023. [2022-07-13 11:38:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.5626223091976517) internal successors, (1597), 1022 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1597 transitions. [2022-07-13 11:38:13,545 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1597 transitions. Word has length 191 [2022-07-13 11:38:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:13,546 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1597 transitions. [2022-07-13 11:38:13,546 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) [2022-07-13 11:38:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1597 transitions. [2022-07-13 11:38:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 11:38:13,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:13,548 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:13,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:38:13,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 11:38:13,767 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 893611286, now seen corresponding path program 1 times [2022-07-13 11:38:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887196696] [2022-07-13 11:38:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 11:38:13,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:13,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887196696] [2022-07-13 11:38:13,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887196696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:13,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:13,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682724035] [2022-07-13 11:38:13,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:13,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:13,887 INFO L87 Difference]: Start difference. First operand 1023 states and 1597 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:15,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:38:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:15,676 INFO L93 Difference]: Finished difference Result 2116 states and 3285 transitions. [2022-07-13 11:38:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-13 11:38:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:15,691 INFO L225 Difference]: With dead ends: 2116 [2022-07-13 11:38:15,691 INFO L226 Difference]: Without dead ends: 1116 [2022-07-13 11:38:15,692 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 [2022-07-13 11:38:15,693 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 88 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:15,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 600 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:38:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-13 11:38:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1023. [2022-07-13 11:38:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-13 11:38:15,710 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 192 [2022-07-13 11:38:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:15,711 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-13 11:38:15,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-13 11:38:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-13 11:38:15,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:15,716 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:15,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 11:38:15,716 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1597975272, now seen corresponding path program 1 times [2022-07-13 11:38:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667300526] [2022-07-13 11:38:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:15,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:15,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667300526] [2022-07-13 11:38:15,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667300526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:15,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:15,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133569897] [2022-07-13 11:38:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:15,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:15,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:15,832 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:17,837 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 [] [2022-07-13 11:38:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:18,154 INFO L93 Difference]: Finished difference Result 2289 states and 3557 transitions. [2022-07-13 11:38:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-07-13 11:38:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:18,158 INFO L225 Difference]: With dead ends: 2289 [2022-07-13 11:38:18,158 INFO L226 Difference]: Without dead ends: 1289 [2022-07-13 11:38:18,159 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 [2022-07-13 11:38:18,159 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 90 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:18,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 615 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-07-13 11:38:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1023. [2022-07-13 11:38:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-13 11:38:18,192 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 205 [2022-07-13 11:38:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:18,192 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-13 11:38:18,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-13 11:38:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-13 11:38:18,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:18,195 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:18,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 11:38:18,196 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2144107753, now seen corresponding path program 1 times [2022-07-13 11:38:18,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:18,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963596109] [2022-07-13 11:38:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 238 proven. 14 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-13 11:38:18,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:18,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963596109] [2022-07-13 11:38:18,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963596109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:38:18,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056096257] [2022-07-13 11:38:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:18,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:38:18,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:38:18,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:38:18,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:38:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:38:18,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:38:18,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-13 11:38:19,012 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-13 11:38:19,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-13 11:38:19,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:38:19,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:38:19,239 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-13 11:38:19,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 21 [2022-07-13 11:38:19,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-13 11:38:19,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:38:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-13 11:38:19,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:38:19,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056096257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:19,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:38:19,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-13 11:38:19,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069701911] [2022-07-13 11:38:19,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:19,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:19,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:38:19,287 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:21,292 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 [] [2022-07-13 11:38:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:21,574 INFO L93 Difference]: Finished difference Result 2247 states and 3494 transitions. [2022-07-13 11:38:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-13 11:38:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:21,578 INFO L225 Difference]: With dead ends: 2247 [2022-07-13 11:38:21,578 INFO L226 Difference]: Without dead ends: 1247 [2022-07-13 11:38:21,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:38:21,580 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 91 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:21,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 613 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-07-13 11:38:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1023. [2022-07-13 11:38:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-13 11:38:21,599 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 206 [2022-07-13 11:38:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:21,600 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-13 11:38:21,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-13 11:38:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-13 11:38:21,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:21,603 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:21,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 11:38:21,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:38:21,813 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1129262156, now seen corresponding path program 1 times [2022-07-13 11:38:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:21,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100208347] [2022-07-13 11:38:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:21,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:21,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100208347] [2022-07-13 11:38:21,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100208347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:21,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:21,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:21,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577738651] [2022-07-13 11:38:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:21,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:21,900 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:23,904 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 [] [2022-07-13 11:38:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:24,238 INFO L93 Difference]: Finished difference Result 2276 states and 3537 transitions. [2022-07-13 11:38:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:24,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-13 11:38:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:24,242 INFO L225 Difference]: With dead ends: 2276 [2022-07-13 11:38:24,242 INFO L226 Difference]: Without dead ends: 1276 [2022-07-13 11:38:24,243 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 [2022-07-13 11:38:24,244 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 82 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:24,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 603 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-07-13 11:38:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1092. [2022-07-13 11:38:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5554537121906509) internal successors, (1697), 1091 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1697 transitions. [2022-07-13 11:38:24,269 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1697 transitions. Word has length 206 [2022-07-13 11:38:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1697 transitions. [2022-07-13 11:38:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1697 transitions. [2022-07-13 11:38:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-13 11:38:24,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:24,274 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:24,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:38:24,274 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 402251252, now seen corresponding path program 1 times [2022-07-13 11:38:24,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:24,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252151874] [2022-07-13 11:38:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:24,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252151874] [2022-07-13 11:38:24,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252151874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:24,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:24,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:24,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198660391] [2022-07-13 11:38:24,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:24,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:24,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:24,400 INFO L87 Difference]: Start difference. First operand 1092 states and 1697 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) [2022-07-13 11:38:26,413 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 [] [2022-07-13 11:38:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:26,714 INFO L93 Difference]: Finished difference Result 2254 states and 3485 transitions. [2022-07-13 11:38:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:26,714 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 207 [2022-07-13 11:38:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:26,717 INFO L225 Difference]: With dead ends: 2254 [2022-07-13 11:38:26,717 INFO L226 Difference]: Without dead ends: 1185 [2022-07-13 11:38:26,718 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 [2022-07-13 11:38:26,718 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 97 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:26,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 598 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-13 11:38:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1092. [2022-07-13 11:38:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5536205316223648) internal successors, (1695), 1091 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1695 transitions. [2022-07-13 11:38:26,734 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1695 transitions. Word has length 207 [2022-07-13 11:38:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:26,734 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1695 transitions. [2022-07-13 11:38:26,734 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) [2022-07-13 11:38:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1695 transitions. [2022-07-13 11:38:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-13 11:38:26,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:26,736 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:26,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 11:38:26,737 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1128334472, now seen corresponding path program 1 times [2022-07-13 11:38:26,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124840124] [2022-07-13 11:38:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:26,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124840124] [2022-07-13 11:38:26,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124840124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:26,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:26,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928366531] [2022-07-13 11:38:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:26,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:26,851 INFO L87 Difference]: Start difference. First operand 1092 states and 1695 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:28,142 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 [] [2022-07-13 11:38:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:28,434 INFO L93 Difference]: Finished difference Result 2254 states and 3481 transitions. [2022-07-13 11:38:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-07-13 11:38:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:28,438 INFO L225 Difference]: With dead ends: 2254 [2022-07-13 11:38:28,438 INFO L226 Difference]: Without dead ends: 1185 [2022-07-13 11:38:28,438 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 [2022-07-13 11:38:28,439 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 90 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:28,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 596 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 11:38:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-13 11:38:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1092. [2022-07-13 11:38:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5517873510540787) internal successors, (1693), 1091 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1693 transitions. [2022-07-13 11:38:28,468 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1693 transitions. Word has length 208 [2022-07-13 11:38:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:28,468 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1693 transitions. [2022-07-13 11:38:28,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1693 transitions. [2022-07-13 11:38:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-13 11:38:28,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:28,471 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:28,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:38:28,471 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1932227823, now seen corresponding path program 1 times [2022-07-13 11:38:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92710533] [2022-07-13 11:38:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:28,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92710533] [2022-07-13 11:38:28,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92710533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:28,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:28,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298145923] [2022-07-13 11:38:28,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:28,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:28,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:28,569 INFO L87 Difference]: Start difference. First operand 1092 states and 1693 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:30,574 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 [] [2022-07-13 11:38:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:30,857 INFO L93 Difference]: Finished difference Result 2234 states and 3451 transitions. [2022-07-13 11:38:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-07-13 11:38:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:30,859 INFO L225 Difference]: With dead ends: 2234 [2022-07-13 11:38:30,860 INFO L226 Difference]: Without dead ends: 1165 [2022-07-13 11:38:30,860 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 [2022-07-13 11:38:30,861 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 86 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:30,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 582 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-07-13 11:38:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1092. [2022-07-13 11:38:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5499541704857929) internal successors, (1691), 1091 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1691 transitions. [2022-07-13 11:38:30,876 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1691 transitions. Word has length 209 [2022-07-13 11:38:30,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:30,876 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1691 transitions. [2022-07-13 11:38:30,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1691 transitions. [2022-07-13 11:38:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-13 11:38:30,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:30,878 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:38:30,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 11:38:30,879 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1406253003, now seen corresponding path program 1 times [2022-07-13 11:38:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401764209] [2022-07-13 11:38:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:31,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:31,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401764209] [2022-07-13 11:38:31,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401764209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:31,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:31,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597501738] [2022-07-13 11:38:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:31,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:31,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:31,004 INFO L87 Difference]: Start difference. First operand 1092 states and 1691 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:33,014 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 [] [2022-07-13 11:38:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:33,269 INFO L93 Difference]: Finished difference Result 2234 states and 3447 transitions. [2022-07-13 11:38:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-07-13 11:38:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:33,272 INFO L225 Difference]: With dead ends: 2234 [2022-07-13 11:38:33,272 INFO L226 Difference]: Without dead ends: 1165 [2022-07-13 11:38:33,273 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 [2022-07-13 11:38:33,273 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 80 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:33,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 580 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-07-13 11:38:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1092. [2022-07-13 11:38:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5481209899175068) internal successors, (1689), 1091 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1689 transitions. [2022-07-13 11:38:33,288 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1689 transitions. Word has length 209 [2022-07-13 11:38:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:33,288 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1689 transitions. [2022-07-13 11:38:33,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1689 transitions. [2022-07-13 11:38:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-13 11:38:33,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:33,290 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:38:33,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 11:38:33,291 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 266712989, now seen corresponding path program 1 times [2022-07-13 11:38:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:33,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499858012] [2022-07-13 11:38:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:33,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:33,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:33,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499858012] [2022-07-13 11:38:33,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499858012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:33,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:33,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:33,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559407528] [2022-07-13 11:38:33,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:33,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:33,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:33,380 INFO L87 Difference]: Start difference. First operand 1092 states and 1689 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:35,391 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 [] [2022-07-13 11:38:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:35,674 INFO L93 Difference]: Finished difference Result 2227 states and 3435 transitions. [2022-07-13 11:38:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-07-13 11:38:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:35,677 INFO L225 Difference]: With dead ends: 2227 [2022-07-13 11:38:35,677 INFO L226 Difference]: Without dead ends: 1158 [2022-07-13 11:38:35,678 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 [2022-07-13 11:38:35,679 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 76 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:35,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 574 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-07-13 11:38:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1092. [2022-07-13 11:38:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.546287809349221) internal successors, (1687), 1091 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1687 transitions. [2022-07-13 11:38:35,694 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1687 transitions. Word has length 210 [2022-07-13 11:38:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:35,694 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1687 transitions. [2022-07-13 11:38:35,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1687 transitions. [2022-07-13 11:38:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-13 11:38:35,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:35,696 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:35,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 11:38:35,697 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 166579950, now seen corresponding path program 1 times [2022-07-13 11:38:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379955271] [2022-07-13 11:38:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:35,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379955271] [2022-07-13 11:38:35,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379955271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:35,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:35,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:35,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338948158] [2022-07-13 11:38:35,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:35,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:35,808 INFO L87 Difference]: Start difference. First operand 1092 states and 1687 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) [2022-07-13 11:38:37,814 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 [] [2022-07-13 11:38:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:38,127 INFO L93 Difference]: Finished difference Result 2444 states and 3751 transitions. [2022-07-13 11:38:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:38,127 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 214 [2022-07-13 11:38:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:38,130 INFO L225 Difference]: With dead ends: 2444 [2022-07-13 11:38:38,130 INFO L226 Difference]: Without dead ends: 1375 [2022-07-13 11:38:38,131 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 [2022-07-13 11:38:38,132 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 123 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:38,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 314 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-07-13 11:38:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1140. [2022-07-13 11:38:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5364354697102722) internal successors, (1750), 1139 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1750 transitions. [2022-07-13 11:38:38,148 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1750 transitions. Word has length 214 [2022-07-13 11:38:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:38,149 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1750 transitions. [2022-07-13 11:38:38,149 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) [2022-07-13 11:38:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1750 transitions. [2022-07-13 11:38:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-13 11:38:38,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:38,151 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:38,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 11:38:38,151 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1870434490, now seen corresponding path program 1 times [2022-07-13 11:38:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:38,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830233912] [2022-07-13 11:38:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:38,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830233912] [2022-07-13 11:38:38,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830233912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:38,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:38,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177685052] [2022-07-13 11:38:38,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:38,254 INFO L87 Difference]: Start difference. First operand 1140 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:40,259 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 [] [2022-07-13 11:38:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:40,493 INFO L93 Difference]: Finished difference Result 2315 states and 3547 transitions. [2022-07-13 11:38:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:40,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-07-13 11:38:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:40,496 INFO L225 Difference]: With dead ends: 2315 [2022-07-13 11:38:40,496 INFO L226 Difference]: Without dead ends: 1198 [2022-07-13 11:38:40,497 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 [2022-07-13 11:38:40,497 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 66 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:40,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 564 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-07-13 11:38:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1140. [2022-07-13 11:38:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5346795434591747) internal successors, (1748), 1139 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1748 transitions. [2022-07-13 11:38:40,520 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1748 transitions. Word has length 215 [2022-07-13 11:38:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:40,521 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1748 transitions. [2022-07-13 11:38:40,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1748 transitions. [2022-07-13 11:38:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-13 11:38:40,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:40,522 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-13 11:38:40,523 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1365737855, now seen corresponding path program 1 times [2022-07-13 11:38:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:40,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555009659] [2022-07-13 11:38:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:40,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555009659] [2022-07-13 11:38:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555009659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:40,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:40,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321945252] [2022-07-13 11:38:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:40,630 INFO L87 Difference]: Start difference. First operand 1140 states and 1748 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:42,635 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 [] [2022-07-13 11:38:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:42,922 INFO L93 Difference]: Finished difference Result 2315 states and 3543 transitions. [2022-07-13 11:38:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-07-13 11:38:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:42,925 INFO L225 Difference]: With dead ends: 2315 [2022-07-13 11:38:42,925 INFO L226 Difference]: Without dead ends: 1198 [2022-07-13 11:38:42,926 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 [2022-07-13 11:38:42,926 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 62 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:42,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 562 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-07-13 11:38:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1140. [2022-07-13 11:38:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5329236172080773) internal successors, (1746), 1139 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1746 transitions. [2022-07-13 11:38:42,942 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1746 transitions. Word has length 217 [2022-07-13 11:38:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:42,943 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1746 transitions. [2022-07-13 11:38:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1746 transitions. [2022-07-13 11:38:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-13 11:38:42,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:42,945 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-13 11:38:42,945 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1697536105, now seen corresponding path program 1 times [2022-07-13 11:38:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:42,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346822394] [2022-07-13 11:38:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:43,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346822394] [2022-07-13 11:38:43,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346822394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:43,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:43,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75645338] [2022-07-13 11:38:43,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:43,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:43,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:43,056 INFO L87 Difference]: Start difference. First operand 1140 states and 1746 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:45,061 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 [] [2022-07-13 11:38:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:45,345 INFO L93 Difference]: Finished difference Result 2456 states and 3729 transitions. [2022-07-13 11:38:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-13 11:38:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:45,347 INFO L225 Difference]: With dead ends: 2456 [2022-07-13 11:38:45,348 INFO L226 Difference]: Without dead ends: 1339 [2022-07-13 11:38:45,349 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 [2022-07-13 11:38:45,349 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:45,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-07-13 11:38:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1140. [2022-07-13 11:38:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5232660228270412) internal successors, (1735), 1139 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1735 transitions. [2022-07-13 11:38:45,377 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1735 transitions. Word has length 218 [2022-07-13 11:38:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:45,378 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1735 transitions. [2022-07-13 11:38:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1735 transitions. [2022-07-13 11:38:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-13 11:38:45,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:45,380 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-13 11:38:45,380 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1226059139, now seen corresponding path program 1 times [2022-07-13 11:38:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266544195] [2022-07-13 11:38:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:45,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266544195] [2022-07-13 11:38:45,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266544195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:45,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:45,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:45,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348425160] [2022-07-13 11:38:45,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:45,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:45,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:45,595 INFO L87 Difference]: Start difference. First operand 1140 states and 1735 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:47,611 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 [] [2022-07-13 11:38:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:47,838 INFO L93 Difference]: Finished difference Result 2299 states and 3491 transitions. [2022-07-13 11:38:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-13 11:38:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:47,840 INFO L225 Difference]: With dead ends: 2299 [2022-07-13 11:38:47,840 INFO L226 Difference]: Without dead ends: 1182 [2022-07-13 11:38:47,841 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 [2022-07-13 11:38:47,841 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 49 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 550 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-13 11:38:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1140. [2022-07-13 11:38:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5215100965759438) internal successors, (1733), 1139 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1733 transitions. [2022-07-13 11:38:47,857 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1733 transitions. Word has length 218 [2022-07-13 11:38:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:47,857 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1733 transitions. [2022-07-13 11:38:47,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1733 transitions. [2022-07-13 11:38:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-13 11:38:47,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:47,859 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:47,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-13 11:38:47,859 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 306712821, now seen corresponding path program 1 times [2022-07-13 11:38:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:47,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231905552] [2022-07-13 11:38:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:47,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231905552] [2022-07-13 11:38:47,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231905552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:47,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:47,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468814868] [2022-07-13 11:38:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:47,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:47,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:47,970 INFO L87 Difference]: Start difference. First operand 1140 states and 1733 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:49,976 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 [] [2022-07-13 11:38:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:50,185 INFO L93 Difference]: Finished difference Result 2295 states and 3483 transitions. [2022-07-13 11:38:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-07-13 11:38:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:50,186 INFO L225 Difference]: With dead ends: 2295 [2022-07-13 11:38:50,186 INFO L226 Difference]: Without dead ends: 1178 [2022-07-13 11:38:50,187 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 [2022-07-13 11:38:50,188 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:50,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 546 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-13 11:38:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1140. [2022-07-13 11:38:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5197541703248463) internal successors, (1731), 1139 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1731 transitions. [2022-07-13 11:38:50,204 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1731 transitions. Word has length 219 [2022-07-13 11:38:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:50,204 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1731 transitions. [2022-07-13 11:38:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1731 transitions. [2022-07-13 11:38:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-13 11:38:50,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:50,206 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:50,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-13 11:38:50,207 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash -331325385, now seen corresponding path program 1 times [2022-07-13 11:38:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:50,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847280293] [2022-07-13 11:38:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:50,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:50,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847280293] [2022-07-13 11:38:50,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847280293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:50,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:50,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:50,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181021820] [2022-07-13 11:38:50,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:50,328 INFO L87 Difference]: Start difference. First operand 1140 states and 1731 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:51,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:38:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:52,171 INFO L93 Difference]: Finished difference Result 2295 states and 3479 transitions. [2022-07-13 11:38:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2022-07-13 11:38:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:52,173 INFO L225 Difference]: With dead ends: 2295 [2022-07-13 11:38:52,173 INFO L226 Difference]: Without dead ends: 1178 [2022-07-13 11:38:52,174 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 [2022-07-13 11:38:52,175 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 50 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:52,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 544 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:38:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-13 11:38:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1140. [2022-07-13 11:38:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.517998244073749) internal successors, (1729), 1139 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1729 transitions. [2022-07-13 11:38:52,202 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1729 transitions. Word has length 220 [2022-07-13 11:38:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:52,202 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1729 transitions. [2022-07-13 11:38:52,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1729 transitions. [2022-07-13 11:38:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-13 11:38:52,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:52,204 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:52,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-13 11:38:52,204 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:52,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1004342270, now seen corresponding path program 1 times [2022-07-13 11:38:52,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:52,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525214379] [2022-07-13 11:38:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:38:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525214379] [2022-07-13 11:38:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525214379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:52,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:52,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420359512] [2022-07-13 11:38:52,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:52,295 INFO L87 Difference]: Start difference. First operand 1140 states and 1729 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:54,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:38:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:54,629 INFO L93 Difference]: Finished difference Result 2441 states and 3694 transitions. [2022-07-13 11:38:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-07-13 11:38:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:54,631 INFO L225 Difference]: With dead ends: 2441 [2022-07-13 11:38:54,631 INFO L226 Difference]: Without dead ends: 1324 [2022-07-13 11:38:54,632 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 [2022-07-13 11:38:54,633 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 89 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:54,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 597 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-07-13 11:38:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1140. [2022-07-13 11:38:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5153643546971027) internal successors, (1726), 1139 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1726 transitions. [2022-07-13 11:38:54,655 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1726 transitions. Word has length 221 [2022-07-13 11:38:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:54,655 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1726 transitions. [2022-07-13 11:38:54,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1726 transitions. [2022-07-13 11:38:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-13 11:38:54,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:54,658 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:54,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-13 11:38:54,658 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash -855690769, now seen corresponding path program 1 times [2022-07-13 11:38:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:54,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690599440] [2022-07-13 11:38:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:38:54,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:54,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690599440] [2022-07-13 11:38:54,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690599440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:54,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:54,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:54,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392508955] [2022-07-13 11:38:54,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:54,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:54,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:54,789 INFO L87 Difference]: Start difference. First operand 1140 states and 1726 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 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) [2022-07-13 11:38:56,795 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 [] [2022-07-13 11:38:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:56,981 INFO L93 Difference]: Finished difference Result 2291 states and 3463 transitions. [2022-07-13 11:38:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:56,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 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 221 [2022-07-13 11:38:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:56,982 INFO L225 Difference]: With dead ends: 2291 [2022-07-13 11:38:56,982 INFO L226 Difference]: Without dead ends: 1174 [2022-07-13 11:38:56,983 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 [2022-07-13 11:38:56,984 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 47 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:56,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 542 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:38:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-07-13 11:38:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1140. [2022-07-13 11:38:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5136084284460052) internal successors, (1724), 1139 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1724 transitions. [2022-07-13 11:38:57,009 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1724 transitions. Word has length 221 [2022-07-13 11:38:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:57,010 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1724 transitions. [2022-07-13 11:38:57,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 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) [2022-07-13 11:38:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1724 transitions. [2022-07-13 11:38:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-13 11:38:57,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:57,012 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-13 11:38:57,013 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:57,013 INFO L85 PathProgramCache]: Analyzing trace with hash 356617902, now seen corresponding path program 1 times [2022-07-13 11:38:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:57,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497990598] [2022-07-13 11:38:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:38:57,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497990598] [2022-07-13 11:38:57,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497990598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:57,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:57,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960753611] [2022-07-13 11:38:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:57,111 INFO L87 Difference]: Start difference. First operand 1140 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:59,123 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 [] [2022-07-13 11:38:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:38:59,410 INFO L93 Difference]: Finished difference Result 2441 states and 3684 transitions. [2022-07-13 11:38:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:38:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-13 11:38:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:38:59,412 INFO L225 Difference]: With dead ends: 2441 [2022-07-13 11:38:59,413 INFO L226 Difference]: Without dead ends: 1324 [2022-07-13 11:38:59,413 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 [2022-07-13 11:38:59,414 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 82 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:38:59,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 595 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:38:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-07-13 11:38:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1140. [2022-07-13 11:38:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5109745390693592) internal successors, (1721), 1139 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1721 transitions. [2022-07-13 11:38:59,430 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1721 transitions. Word has length 222 [2022-07-13 11:38:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:38:59,430 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1721 transitions. [2022-07-13 11:38:59,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:38:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1721 transitions. [2022-07-13 11:38:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-13 11:38:59,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:38:59,432 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:38:59,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-13 11:38:59,432 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:38:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:38:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2141757129, now seen corresponding path program 1 times [2022-07-13 11:38:59,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:38:59,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903432149] [2022-07-13 11:38:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:38:59,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:38:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:38:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:38:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:38:59,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903432149] [2022-07-13 11:38:59,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903432149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:38:59,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:38:59,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:38:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430061483] [2022-07-13 11:38:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:38:59,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:38:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:38:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:38:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:38:59,526 INFO L87 Difference]: Start difference. First operand 1140 states and 1721 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:01,531 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 [] [2022-07-13 11:39:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:01,836 INFO L93 Difference]: Finished difference Result 2582 states and 3889 transitions. [2022-07-13 11:39:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:01,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-13 11:39:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:01,838 INFO L225 Difference]: With dead ends: 2582 [2022-07-13 11:39:01,838 INFO L226 Difference]: Without dead ends: 1465 [2022-07-13 11:39:01,839 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 [2022-07-13 11:39:01,839 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 113 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:01,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:39:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-07-13 11:39:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1239. [2022-07-13 11:39:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5145395799676897) internal successors, (1875), 1238 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1875 transitions. [2022-07-13 11:39:01,858 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1875 transitions. Word has length 222 [2022-07-13 11:39:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:01,859 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1875 transitions. [2022-07-13 11:39:01,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1875 transitions. [2022-07-13 11:39:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-13 11:39:01,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:01,861 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:01,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-13 11:39:01,861 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash 721111161, now seen corresponding path program 1 times [2022-07-13 11:39:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:01,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408103231] [2022-07-13 11:39:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:01,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:39:01,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:01,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408103231] [2022-07-13 11:39:01,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408103231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:01,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:01,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:01,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470972359] [2022-07-13 11:39:01,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:01,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:01,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:01,956 INFO L87 Difference]: Start difference. First operand 1239 states and 1875 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) [2022-07-13 11:39:03,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:03,336 INFO L93 Difference]: Finished difference Result 2609 states and 3944 transitions. [2022-07-13 11:39:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:03,347 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 223 [2022-07-13 11:39:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:03,349 INFO L225 Difference]: With dead ends: 2609 [2022-07-13 11:39:03,349 INFO L226 Difference]: Without dead ends: 1393 [2022-07-13 11:39:03,351 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 [2022-07-13 11:39:03,351 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 77 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:03,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 579 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 11:39:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-07-13 11:39:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2022-07-13 11:39:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5121163166397416) internal successors, (1872), 1238 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1872 transitions. [2022-07-13 11:39:03,369 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1872 transitions. Word has length 223 [2022-07-13 11:39:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:03,369 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1872 transitions. [2022-07-13 11:39:03,369 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) [2022-07-13 11:39:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1872 transitions. [2022-07-13 11:39:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-13 11:39:03,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:03,371 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:39:03,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-13 11:39:03,372 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1677597631, now seen corresponding path program 1 times [2022-07-13 11:39:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771348972] [2022-07-13 11:39:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:39:03,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:03,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771348972] [2022-07-13 11:39:03,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771348972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:03,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:03,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814868845] [2022-07-13 11:39:03,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:03,489 INFO L87 Difference]: Start difference. First operand 1239 states and 1872 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) [2022-07-13 11:39:05,496 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 [] [2022-07-13 11:39:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:05,748 INFO L93 Difference]: Finished difference Result 2609 states and 3938 transitions. [2022-07-13 11:39:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:05,749 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 223 [2022-07-13 11:39:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:05,750 INFO L225 Difference]: With dead ends: 2609 [2022-07-13 11:39:05,750 INFO L226 Difference]: Without dead ends: 1393 [2022-07-13 11:39:05,752 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 [2022-07-13 11:39:05,752 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 71 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:05,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 577 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-07-13 11:39:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2022-07-13 11:39:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5096930533117932) internal successors, (1869), 1238 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1869 transitions. [2022-07-13 11:39:05,771 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1869 transitions. Word has length 223 [2022-07-13 11:39:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:05,771 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1869 transitions. [2022-07-13 11:39:05,771 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) [2022-07-13 11:39:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1869 transitions. [2022-07-13 11:39:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-13 11:39:05,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:05,773 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:05,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-13 11:39:05,773 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash -265663596, now seen corresponding path program 1 times [2022-07-13 11:39:05,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:05,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039483887] [2022-07-13 11:39:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 11:39:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:05,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039483887] [2022-07-13 11:39:05,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039483887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:05,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:05,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053499793] [2022-07-13 11:39:05,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:05,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:05,897 INFO L87 Difference]: Start difference. First operand 1239 states and 1869 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:07,903 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 [] [2022-07-13 11:39:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:08,111 INFO L93 Difference]: Finished difference Result 2481 states and 3739 transitions. [2022-07-13 11:39:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-07-13 11:39:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:08,113 INFO L225 Difference]: With dead ends: 2481 [2022-07-13 11:39:08,113 INFO L226 Difference]: Without dead ends: 1265 [2022-07-13 11:39:08,114 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 [2022-07-13 11:39:08,114 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 35 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:08,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 532 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-13 11:39:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-07-13 11:39:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5080775444264944) internal successors, (1867), 1238 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1867 transitions. [2022-07-13 11:39:08,138 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1867 transitions. Word has length 223 [2022-07-13 11:39:08,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:08,138 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1867 transitions. [2022-07-13 11:39:08,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:08,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1867 transitions. [2022-07-13 11:39:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-13 11:39:08,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:08,140 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:39:08,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-13 11:39:08,140 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1376802131, now seen corresponding path program 1 times [2022-07-13 11:39:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135442526] [2022-07-13 11:39:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:39:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135442526] [2022-07-13 11:39:08,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135442526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:08,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:08,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021163188] [2022-07-13 11:39:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:08,247 INFO L87 Difference]: Start difference. First operand 1239 states and 1867 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:10,253 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 [] [2022-07-13 11:39:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:10,505 INFO L93 Difference]: Finished difference Result 2599 states and 3917 transitions. [2022-07-13 11:39:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-07-13 11:39:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:10,507 INFO L225 Difference]: With dead ends: 2599 [2022-07-13 11:39:10,507 INFO L226 Difference]: Without dead ends: 1383 [2022-07-13 11:39:10,508 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 [2022-07-13 11:39:10,509 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 67 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:10,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 571 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-07-13 11:39:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1239. [2022-07-13 11:39:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.505654281098546) internal successors, (1864), 1238 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1864 transitions. [2022-07-13 11:39:10,543 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1864 transitions. Word has length 224 [2022-07-13 11:39:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:10,544 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1864 transitions. [2022-07-13 11:39:10,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1864 transitions. [2022-07-13 11:39:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-13 11:39:10,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:10,546 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:10,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-13 11:39:10,547 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash -473713383, now seen corresponding path program 1 times [2022-07-13 11:39:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:10,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845465651] [2022-07-13 11:39:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:39:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845465651] [2022-07-13 11:39:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845465651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:10,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:10,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677390289] [2022-07-13 11:39:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:10,639 INFO L87 Difference]: Start difference. First operand 1239 states and 1864 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:12,655 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 [] [2022-07-13 11:39:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:12,888 INFO L93 Difference]: Finished difference Result 2481 states and 3729 transitions. [2022-07-13 11:39:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-07-13 11:39:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:12,890 INFO L225 Difference]: With dead ends: 2481 [2022-07-13 11:39:12,890 INFO L226 Difference]: Without dead ends: 1265 [2022-07-13 11:39:12,890 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 [2022-07-13 11:39:12,891 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 33 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:12,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 530 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-13 11:39:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-07-13 11:39:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.504038772213247) internal successors, (1862), 1238 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1862 transitions. [2022-07-13 11:39:12,909 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1862 transitions. Word has length 224 [2022-07-13 11:39:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:12,910 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1862 transitions. [2022-07-13 11:39:12,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1862 transitions. [2022-07-13 11:39:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-13 11:39:12,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:12,912 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:12,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-13 11:39:12,912 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1378487510, now seen corresponding path program 1 times [2022-07-13 11:39:12,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:12,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590795486] [2022-07-13 11:39:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:39:13,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:13,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590795486] [2022-07-13 11:39:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590795486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:13,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:13,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249367791] [2022-07-13 11:39:13,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:13,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:13,018 INFO L87 Difference]: Start difference. First operand 1239 states and 1862 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:15,024 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 [] [2022-07-13 11:39:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:15,222 INFO L93 Difference]: Finished difference Result 2477 states and 3721 transitions. [2022-07-13 11:39:15,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-07-13 11:39:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:15,224 INFO L225 Difference]: With dead ends: 2477 [2022-07-13 11:39:15,224 INFO L226 Difference]: Without dead ends: 1261 [2022-07-13 11:39:15,225 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 [2022-07-13 11:39:15,225 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:15,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 526 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-07-13 11:39:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1239. [2022-07-13 11:39:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5024232633279484) internal successors, (1860), 1238 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1860 transitions. [2022-07-13 11:39:15,246 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1860 transitions. Word has length 225 [2022-07-13 11:39:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:15,246 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1860 transitions. [2022-07-13 11:39:15,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1860 transitions. [2022-07-13 11:39:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-13 11:39:15,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:15,248 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:15,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-13 11:39:15,248 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 995473950, now seen corresponding path program 1 times [2022-07-13 11:39:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865965529] [2022-07-13 11:39:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:39:15,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865965529] [2022-07-13 11:39:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865965529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:15,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445575943] [2022-07-13 11:39:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:15,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:15,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:15,359 INFO L87 Difference]: Start difference. First operand 1239 states and 1860 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:17,371 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 [] [2022-07-13 11:39:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:17,651 INFO L93 Difference]: Finished difference Result 2780 states and 4158 transitions. [2022-07-13 11:39:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2022-07-13 11:39:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:17,654 INFO L225 Difference]: With dead ends: 2780 [2022-07-13 11:39:17,654 INFO L226 Difference]: Without dead ends: 1564 [2022-07-13 11:39:17,655 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 [2022-07-13 11:39:17,663 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 109 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:17,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:39:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2022-07-13 11:39:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1350. [2022-07-13 11:39:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.5040770941438102) internal successors, (2029), 1349 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2029 transitions. [2022-07-13 11:39:17,698 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2029 transitions. Word has length 226 [2022-07-13 11:39:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:17,698 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2029 transitions. [2022-07-13 11:39:17,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2029 transitions. [2022-07-13 11:39:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-13 11:39:17,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:17,700 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-13 11:39:17,700 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1361684283, now seen corresponding path program 1 times [2022-07-13 11:39:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:17,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360924038] [2022-07-13 11:39:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:17,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:39:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360924038] [2022-07-13 11:39:17,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360924038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:17,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:17,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764862885] [2022-07-13 11:39:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:17,794 INFO L87 Difference]: Start difference. First operand 1350 states and 2029 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:19,799 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 [] [2022-07-13 11:39:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:20,035 INFO L93 Difference]: Finished difference Result 2695 states and 4051 transitions. [2022-07-13 11:39:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:20,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-07-13 11:39:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:20,038 INFO L225 Difference]: With dead ends: 2695 [2022-07-13 11:39:20,038 INFO L226 Difference]: Without dead ends: 1368 [2022-07-13 11:39:20,039 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 [2022-07-13 11:39:20,043 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 25 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:20,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 520 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-07-13 11:39:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1350. [2022-07-13 11:39:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.502594514455152) internal successors, (2027), 1349 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2027 transitions. [2022-07-13 11:39:20,075 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2027 transitions. Word has length 227 [2022-07-13 11:39:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:20,075 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2027 transitions. [2022-07-13 11:39:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2027 transitions. [2022-07-13 11:39:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-13 11:39:20,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:20,077 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:20,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-13 11:39:20,077 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash 939848528, now seen corresponding path program 1 times [2022-07-13 11:39:20,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:20,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563019297] [2022-07-13 11:39:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:20,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 11:39:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563019297] [2022-07-13 11:39:20,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563019297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:20,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:20,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203994129] [2022-07-13 11:39:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:20,231 INFO L87 Difference]: Start difference. First operand 1350 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:21,702 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 [] [2022-07-13 11:39:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:21,959 INFO L93 Difference]: Finished difference Result 2809 states and 4219 transitions. [2022-07-13 11:39:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-07-13 11:39:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:21,961 INFO L225 Difference]: With dead ends: 2809 [2022-07-13 11:39:21,961 INFO L226 Difference]: Without dead ends: 1482 [2022-07-13 11:39:21,962 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 [2022-07-13 11:39:21,962 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:21,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 561 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 11:39:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-07-13 11:39:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1356. [2022-07-13 11:39:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.500369003690037) internal successors, (2033), 1355 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2033 transitions. [2022-07-13 11:39:21,995 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2033 transitions. Word has length 229 [2022-07-13 11:39:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:21,995 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 2033 transitions. [2022-07-13 11:39:21,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2033 transitions. [2022-07-13 11:39:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-13 11:39:21,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:21,997 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:21,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-13 11:39:21,998 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:21,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1215121339, now seen corresponding path program 1 times [2022-07-13 11:39:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:21,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530821526] [2022-07-13 11:39:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:21,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:39:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:22,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530821526] [2022-07-13 11:39:22,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530821526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:22,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:22,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943522095] [2022-07-13 11:39:22,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:22,095 INFO L87 Difference]: Start difference. First operand 1356 states and 2033 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:23,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:24,230 INFO L93 Difference]: Finished difference Result 3113 states and 4660 transitions. [2022-07-13 11:39:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-07-13 11:39:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:24,233 INFO L225 Difference]: With dead ends: 3113 [2022-07-13 11:39:24,233 INFO L226 Difference]: Without dead ends: 1780 [2022-07-13 11:39:24,234 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 [2022-07-13 11:39:24,235 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 107 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:24,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 306 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:39:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-07-13 11:39:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1572. [2022-07-13 11:39:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 1.5085932527052832) internal successors, (2370), 1571 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2370 transitions. [2022-07-13 11:39:24,273 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2370 transitions. Word has length 230 [2022-07-13 11:39:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:24,273 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2370 transitions. [2022-07-13 11:39:24,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2370 transitions. [2022-07-13 11:39:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-13 11:39:24,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:24,276 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:24,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-13 11:39:24,276 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:24,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2076780555, now seen corresponding path program 1 times [2022-07-13 11:39:24,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:24,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322716681] [2022-07-13 11:39:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:24,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 11:39:24,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322716681] [2022-07-13 11:39:24,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322716681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:24,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:24,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:24,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686180735] [2022-07-13 11:39:24,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:24,427 INFO L87 Difference]: Start difference. First operand 1572 states and 2370 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:26,344 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 [] [2022-07-13 11:39:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:26,570 INFO L93 Difference]: Finished difference Result 3223 states and 4854 transitions. [2022-07-13 11:39:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-07-13 11:39:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:26,571 INFO L225 Difference]: With dead ends: 3223 [2022-07-13 11:39:26,572 INFO L226 Difference]: Without dead ends: 1674 [2022-07-13 11:39:26,572 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 [2022-07-13 11:39:26,573 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 43 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:26,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 549 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:39:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-07-13 11:39:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1581. [2022-07-13 11:39:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.509493670886076) internal successors, (2385), 1580 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2385 transitions. [2022-07-13 11:39:26,597 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2385 transitions. Word has length 231 [2022-07-13 11:39:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2385 transitions. [2022-07-13 11:39:26,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2385 transitions. [2022-07-13 11:39:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-13 11:39:26,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:26,599 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-13 11:39:26,599 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 168015746, now seen corresponding path program 1 times [2022-07-13 11:39:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656657387] [2022-07-13 11:39:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 11:39:26,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:26,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656657387] [2022-07-13 11:39:26,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656657387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:26,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:26,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450585794] [2022-07-13 11:39:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:26,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:26,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:26,704 INFO L87 Difference]: Start difference. First operand 1581 states and 2385 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:27,973 INFO L93 Difference]: Finished difference Result 3338 states and 5007 transitions. [2022-07-13 11:39:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-07-13 11:39:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:27,975 INFO L225 Difference]: With dead ends: 3338 [2022-07-13 11:39:27,975 INFO L226 Difference]: Without dead ends: 1780 [2022-07-13 11:39:27,976 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 [2022-07-13 11:39:27,976 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 106 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:27,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:39:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-07-13 11:39:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1581. [2022-07-13 11:39:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.5044303797468355) internal successors, (2377), 1580 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2377 transitions. [2022-07-13 11:39:28,005 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2377 transitions. Word has length 231 [2022-07-13 11:39:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:28,005 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2377 transitions. [2022-07-13 11:39:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2377 transitions. [2022-07-13 11:39:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-13 11:39:28,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:28,007 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:28,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-13 11:39:28,008 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1882170829, now seen corresponding path program 1 times [2022-07-13 11:39:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:28,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927206561] [2022-07-13 11:39:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:28,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:39:28,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:28,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927206561] [2022-07-13 11:39:28,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927206561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:28,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:28,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:28,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929974555] [2022-07-13 11:39:28,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:28,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:28,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:28,107 INFO L87 Difference]: Start difference. First operand 1581 states and 2377 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 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) [2022-07-13 11:39:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:29,307 INFO L93 Difference]: Finished difference Result 3223 states and 4835 transitions. [2022-07-13 11:39:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 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 232 [2022-07-13 11:39:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:29,309 INFO L225 Difference]: With dead ends: 3223 [2022-07-13 11:39:29,309 INFO L226 Difference]: Without dead ends: 1665 [2022-07-13 11:39:29,310 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 [2022-07-13 11:39:29,310 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:29,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 543 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:39:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-07-13 11:39:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1587. [2022-07-13 11:39:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.5025220680958387) internal successors, (2383), 1586 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2383 transitions. [2022-07-13 11:39:29,355 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2383 transitions. Word has length 232 [2022-07-13 11:39:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:29,355 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2383 transitions. [2022-07-13 11:39:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 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) [2022-07-13 11:39:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2383 transitions. [2022-07-13 11:39:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-07-13 11:39:29,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:29,357 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:29,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-13 11:39:29,358 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1442086911, now seen corresponding path program 1 times [2022-07-13 11:39:29,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:29,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758711843] [2022-07-13 11:39:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:39:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758711843] [2022-07-13 11:39:29,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758711843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:29,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:29,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:29,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18022262] [2022-07-13 11:39:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:29,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:29,455 INFO L87 Difference]: Start difference. First operand 1587 states and 2383 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:31,460 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 [] [2022-07-13 11:39:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:31,687 INFO L93 Difference]: Finished difference Result 3223 states and 4832 transitions. [2022-07-13 11:39:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2022-07-13 11:39:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:31,689 INFO L225 Difference]: With dead ends: 3223 [2022-07-13 11:39:31,689 INFO L226 Difference]: Without dead ends: 1659 [2022-07-13 11:39:31,690 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 [2022-07-13 11:39:31,691 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 34 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:31,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 539 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-13 11:39:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1590. [2022-07-13 11:39:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.5015733165512901) internal successors, (2386), 1589 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2386 transitions. [2022-07-13 11:39:31,733 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2386 transitions. Word has length 233 [2022-07-13 11:39:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:31,734 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2386 transitions. [2022-07-13 11:39:31,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2386 transitions. [2022-07-13 11:39:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-13 11:39:31,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:31,736 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:31,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-13 11:39:31,736 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash 505533037, now seen corresponding path program 1 times [2022-07-13 11:39:31,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:31,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145390264] [2022-07-13 11:39:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:31,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 11:39:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145390264] [2022-07-13 11:39:31,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145390264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:31,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:31,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484542958] [2022-07-13 11:39:31,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:31,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:31,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:31,831 INFO L87 Difference]: Start difference. First operand 1590 states and 2386 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:33,837 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 [] [2022-07-13 11:39:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:34,058 INFO L93 Difference]: Finished difference Result 3226 states and 4832 transitions. [2022-07-13 11:39:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-13 11:39:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:34,060 INFO L225 Difference]: With dead ends: 3226 [2022-07-13 11:39:34,060 INFO L226 Difference]: Without dead ends: 1659 [2022-07-13 11:39:34,061 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 [2022-07-13 11:39:34,061 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 38 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:34,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 537 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-13 11:39:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1590. [2022-07-13 11:39:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.499685336689742) internal successors, (2383), 1589 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2383 transitions. [2022-07-13 11:39:34,098 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2383 transitions. Word has length 234 [2022-07-13 11:39:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:34,098 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2383 transitions. [2022-07-13 11:39:34,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2383 transitions. [2022-07-13 11:39:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-13 11:39:34,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:34,101 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:39:34,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-13 11:39:34,101 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash 198969349, now seen corresponding path program 1 times [2022-07-13 11:39:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460675143] [2022-07-13 11:39:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:39:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460675143] [2022-07-13 11:39:34,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460675143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:34,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:34,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:39:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118872696] [2022-07-13 11:39:34,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:39:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:39:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:39:34,328 INFO L87 Difference]: Start difference. First operand 1590 states and 2383 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:36,334 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 [] [2022-07-13 11:39:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:36,782 INFO L93 Difference]: Finished difference Result 3581 states and 5320 transitions. [2022-07-13 11:39:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:39:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-13 11:39:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:36,784 INFO L225 Difference]: With dead ends: 3581 [2022-07-13 11:39:36,784 INFO L226 Difference]: Without dead ends: 2014 [2022-07-13 11:39:36,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:39:36,786 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 269 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:36,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 645 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 11:39:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-07-13 11:39:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1656. [2022-07-13 11:39:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 1.4978851963746223) internal successors, (2479), 1655 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2479 transitions. [2022-07-13 11:39:36,824 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2479 transitions. Word has length 234 [2022-07-13 11:39:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2479 transitions. [2022-07-13 11:39:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2479 transitions. [2022-07-13 11:39:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-13 11:39:36,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:36,827 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:39:36,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-13 11:39:36,827 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1942891129, now seen corresponding path program 1 times [2022-07-13 11:39:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340348607] [2022-07-13 11:39:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:36,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:39:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340348607] [2022-07-13 11:39:37,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340348607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:37,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:37,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:39:37,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776242452] [2022-07-13 11:39:37,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:39:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:39:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:39:37,058 INFO L87 Difference]: Start difference. First operand 1656 states and 2479 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:39,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:41,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:43,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:45,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:46,107 INFO L93 Difference]: Finished difference Result 4127 states and 6133 transitions. [2022-07-13 11:39:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:39:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-13 11:39:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:46,111 INFO L225 Difference]: With dead ends: 4127 [2022-07-13 11:39:46,111 INFO L226 Difference]: Without dead ends: 2494 [2022-07-13 11:39:46,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:39:46,112 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 206 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:46,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1258 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1030 Invalid, 4 Unknown, 0 Unchecked, 8.9s Time] [2022-07-13 11:39:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2022-07-13 11:39:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2282. [2022-07-13 11:39:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4932047347654538) internal successors, (3406), 2281 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3406 transitions. [2022-07-13 11:39:46,156 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3406 transitions. Word has length 234 [2022-07-13 11:39:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:46,156 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3406 transitions. [2022-07-13 11:39:46,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3406 transitions. [2022-07-13 11:39:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-13 11:39:46,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:46,159 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:46,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-13 11:39:46,159 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -682883463, now seen corresponding path program 1 times [2022-07-13 11:39:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:46,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898713076] [2022-07-13 11:39:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-13 11:39:46,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:46,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898713076] [2022-07-13 11:39:46,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898713076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:46,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:46,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601110814] [2022-07-13 11:39:46,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:46,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:46,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:46,272 INFO L87 Difference]: Start difference. First operand 2282 states and 3406 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:48,278 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 [] [2022-07-13 11:39:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:48,505 INFO L93 Difference]: Finished difference Result 4636 states and 6905 transitions. [2022-07-13 11:39:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:48,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-13 11:39:48,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:48,508 INFO L225 Difference]: With dead ends: 4636 [2022-07-13 11:39:48,508 INFO L226 Difference]: Without dead ends: 2377 [2022-07-13 11:39:48,510 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 [2022-07-13 11:39:48,510 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 35 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:48,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 535 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-07-13 11:39:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2282. [2022-07-13 11:39:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4910127137220517) internal successors, (3401), 2281 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3401 transitions. [2022-07-13 11:39:48,553 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3401 transitions. Word has length 235 [2022-07-13 11:39:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:48,553 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3401 transitions. [2022-07-13 11:39:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3401 transitions. [2022-07-13 11:39:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-13 11:39:48,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:48,556 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:39:48,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-13 11:39:48,556 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash 999970559, now seen corresponding path program 1 times [2022-07-13 11:39:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281654958] [2022-07-13 11:39:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:39:48,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281654958] [2022-07-13 11:39:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281654958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:48,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:48,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:39:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475801270] [2022-07-13 11:39:48,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:48,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:39:48,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:39:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:39:48,739 INFO L87 Difference]: Start difference. First operand 2282 states and 3401 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:50,746 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 [] [2022-07-13 11:39:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:51,163 INFO L93 Difference]: Finished difference Result 4924 states and 7288 transitions. [2022-07-13 11:39:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:39:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-13 11:39:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:51,166 INFO L225 Difference]: With dead ends: 4924 [2022-07-13 11:39:51,166 INFO L226 Difference]: Without dead ends: 2665 [2022-07-13 11:39:51,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:39:51,168 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 247 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:51,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 625 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 319 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:39:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-07-13 11:39:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2285. [2022-07-13 11:39:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4868651488616462) internal successors, (3396), 2284 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3396 transitions. [2022-07-13 11:39:51,218 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3396 transitions. Word has length 235 [2022-07-13 11:39:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:51,218 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3396 transitions. [2022-07-13 11:39:51,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3396 transitions. [2022-07-13 11:39:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-13 11:39:51,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:51,221 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:39:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-13 11:39:51,221 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1776964066, now seen corresponding path program 1 times [2022-07-13 11:39:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:51,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612498098] [2022-07-13 11:39:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:51,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-13 11:39:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612498098] [2022-07-13 11:39:51,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612498098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:51,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:51,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:39:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439436977] [2022-07-13 11:39:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:51,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:39:51,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:39:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:39:51,371 INFO L87 Difference]: Start difference. First operand 2285 states and 3396 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:53,380 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 [] [2022-07-13 11:39:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:39:53,625 INFO L93 Difference]: Finished difference Result 4621 states and 6857 transitions. [2022-07-13 11:39:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:39:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-13 11:39:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:39:53,627 INFO L225 Difference]: With dead ends: 4621 [2022-07-13 11:39:53,627 INFO L226 Difference]: Without dead ends: 2359 [2022-07-13 11:39:53,628 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 [2022-07-13 11:39:53,629 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 36 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:39:53,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 550 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:39:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-07-13 11:39:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2285. [2022-07-13 11:39:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4851138353765323) internal successors, (3392), 2284 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3392 transitions. [2022-07-13 11:39:53,693 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3392 transitions. Word has length 235 [2022-07-13 11:39:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:39:53,693 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3392 transitions. [2022-07-13 11:39:53,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3392 transitions. [2022-07-13 11:39:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-13 11:39:53,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:39:53,697 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:39:53,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-13 11:39:53,697 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:39:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:39:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -973194819, now seen corresponding path program 1 times [2022-07-13 11:39:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:39:53,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365801548] [2022-07-13 11:39:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:39:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:39:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:39:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:39:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:39:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365801548] [2022-07-13 11:39:53,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365801548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:39:53,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:39:53,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:39:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840371878] [2022-07-13 11:39:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:39:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:39:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:39:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:39:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:39:53,891 INFO L87 Difference]: Start difference. First operand 2285 states and 3392 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:39:55,899 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 [] [2022-07-13 11:39:57,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:39:59,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:00,993 INFO L93 Difference]: Finished difference Result 5382 states and 7948 transitions. [2022-07-13 11:40:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:40:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-13 11:40:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:00,998 INFO L225 Difference]: With dead ends: 5382 [2022-07-13 11:40:00,998 INFO L226 Difference]: Without dead ends: 3120 [2022-07-13 11:40:01,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:40:01,001 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 346 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:01,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1107 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 850 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2022-07-13 11:40:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-07-13 11:40:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2285. [2022-07-13 11:40:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4851138353765323) internal successors, (3392), 2284 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3392 transitions. [2022-07-13 11:40:01,099 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3392 transitions. Word has length 235 [2022-07-13 11:40:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:01,100 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3392 transitions. [2022-07-13 11:40:01,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3392 transitions. [2022-07-13 11:40:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-13 11:40:01,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:01,103 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:40:01,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-13 11:40:01,104 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1701567074, now seen corresponding path program 1 times [2022-07-13 11:40:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:01,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759924491] [2022-07-13 11:40:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-13 11:40:01,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759924491] [2022-07-13 11:40:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759924491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:01,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:01,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:40:01,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835507997] [2022-07-13 11:40:01,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:40:01,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:01,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:40:01,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:40:01,220 INFO L87 Difference]: Start difference. First operand 2285 states and 3392 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:02,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:03,166 INFO L93 Difference]: Finished difference Result 4741 states and 7016 transitions. [2022-07-13 11:40:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:40:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-07-13 11:40:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:03,169 INFO L225 Difference]: With dead ends: 4741 [2022-07-13 11:40:03,169 INFO L226 Difference]: Without dead ends: 2479 [2022-07-13 11:40:03,170 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 [2022-07-13 11:40:03,170 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:03,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 306 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 11:40:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-07-13 11:40:03,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2283. [2022-07-13 11:40:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 1.4645048203330413) internal successors, (3342), 2282 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3342 transitions. [2022-07-13 11:40:03,214 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3342 transitions. Word has length 237 [2022-07-13 11:40:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:03,214 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 3342 transitions. [2022-07-13 11:40:03,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:03,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3342 transitions. [2022-07-13 11:40:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-13 11:40:03,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:03,216 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:03,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-13 11:40:03,217 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:03,217 INFO L85 PathProgramCache]: Analyzing trace with hash -342440725, now seen corresponding path program 1 times [2022-07-13 11:40:03,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:03,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471409817] [2022-07-13 11:40:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 306 proven. 108 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 11:40:03,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:03,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471409817] [2022-07-13 11:40:03,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471409817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:40:03,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813266753] [2022-07-13 11:40:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:03,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:40:03,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:40:03,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:40:03,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:40:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:04,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:40:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:40:04,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-13 11:40:04,598 INFO L356 Elim1Store]: treesize reduction 37, result has 45.6 percent of original size [2022-07-13 11:40:04,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 111 [2022-07-13 11:40:04,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 96 [2022-07-13 11:40:04,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 66 [2022-07-13 11:40:04,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:40:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 331 proven. 12 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-13 11:40:04,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:40:04,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 89 [2022-07-13 11:40:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-13 11:40:04,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813266753] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:40:04,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:40:04,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 7] total 14 [2022-07-13 11:40:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512441498] [2022-07-13 11:40:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:04,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:40:04,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:40:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:40:04,714 INFO L87 Difference]: Start difference. First operand 2283 states and 3342 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:06,013 INFO L93 Difference]: Finished difference Result 4756 states and 6938 transitions. [2022-07-13 11:40:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:40:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-07-13 11:40:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:06,016 INFO L225 Difference]: With dead ends: 4756 [2022-07-13 11:40:06,016 INFO L226 Difference]: Without dead ends: 2496 [2022-07-13 11:40:06,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:40:06,018 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 123 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:06,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 353 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:40:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-07-13 11:40:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2173. [2022-07-13 11:40:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 1.4599447513812154) internal successors, (3171), 2172 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3171 transitions. [2022-07-13 11:40:06,064 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3171 transitions. Word has length 250 [2022-07-13 11:40:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:06,064 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3171 transitions. [2022-07-13 11:40:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3171 transitions. [2022-07-13 11:40:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-13 11:40:06,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:06,066 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:06,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:40:06,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:40:06,267 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash 425026962, now seen corresponding path program 1 times [2022-07-13 11:40:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:06,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040235232] [2022-07-13 11:40:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-07-13 11:40:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040235232] [2022-07-13 11:40:06,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040235232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:06,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:06,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:40:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770047037] [2022-07-13 11:40:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:40:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:40:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:40:06,399 INFO L87 Difference]: Start difference. First operand 2173 states and 3171 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:07,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:07,686 INFO L93 Difference]: Finished difference Result 4359 states and 6360 transitions. [2022-07-13 11:40:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:40:07,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-07-13 11:40:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:07,702 INFO L225 Difference]: With dead ends: 4359 [2022-07-13 11:40:07,702 INFO L226 Difference]: Without dead ends: 2209 [2022-07-13 11:40:07,703 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 [2022-07-13 11:40:07,703 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 19 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:07,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 526 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:40:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-07-13 11:40:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2173. [2022-07-13 11:40:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 1.4585635359116023) internal successors, (3168), 2172 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3168 transitions. [2022-07-13 11:40:07,747 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3168 transitions. Word has length 250 [2022-07-13 11:40:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:07,747 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3168 transitions. [2022-07-13 11:40:07,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3168 transitions. [2022-07-13 11:40:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-13 11:40:07,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:07,749 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:07,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-13 11:40:07,750 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:07,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1396127449, now seen corresponding path program 1 times [2022-07-13 11:40:07,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:07,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565625528] [2022-07-13 11:40:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:07,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-13 11:40:07,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565625528] [2022-07-13 11:40:07,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565625528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:07,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:07,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:40:07,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582332919] [2022-07-13 11:40:07,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:07,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:40:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:40:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:40:07,921 INFO L87 Difference]: Start difference. First operand 2173 states and 3168 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:09,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:11,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:12,319 INFO L93 Difference]: Finished difference Result 3939 states and 5731 transitions. [2022-07-13 11:40:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:40:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-13 11:40:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:12,321 INFO L225 Difference]: With dead ends: 3939 [2022-07-13 11:40:12,321 INFO L226 Difference]: Without dead ends: 1789 [2022-07-13 11:40:12,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:40:12,323 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 138 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:12,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 397 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 325 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:40:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-07-13 11:40:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1524. [2022-07-13 11:40:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 1.4530531845042678) internal successors, (2213), 1523 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2213 transitions. [2022-07-13 11:40:12,358 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2213 transitions. Word has length 251 [2022-07-13 11:40:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:12,358 INFO L495 AbstractCegarLoop]: Abstraction has 1524 states and 2213 transitions. [2022-07-13 11:40:12,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2213 transitions. [2022-07-13 11:40:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-13 11:40:12,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:12,360 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-13 11:40:12,360 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1556018017, now seen corresponding path program 1 times [2022-07-13 11:40:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198058629] [2022-07-13 11:40:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-13 11:40:12,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:12,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198058629] [2022-07-13 11:40:12,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198058629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:12,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:12,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:40:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839997130] [2022-07-13 11:40:12,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:40:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:40:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:40:12,567 INFO L87 Difference]: Start difference. First operand 1524 states and 2213 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:14,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:16,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:17,182 INFO L93 Difference]: Finished difference Result 3592 states and 5170 transitions. [2022-07-13 11:40:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:40:17,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-13 11:40:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:17,184 INFO L225 Difference]: With dead ends: 3592 [2022-07-13 11:40:17,185 INFO L226 Difference]: Without dead ends: 2091 [2022-07-13 11:40:17,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:40:17,185 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 343 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:17,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 766 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 478 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-07-13 11:40:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-07-13 11:40:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1581. [2022-07-13 11:40:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.4462025316455696) internal successors, (2285), 1580 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2285 transitions. [2022-07-13 11:40:17,228 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2285 transitions. Word has length 251 [2022-07-13 11:40:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:17,228 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2285 transitions. [2022-07-13 11:40:17,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2285 transitions. [2022-07-13 11:40:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-13 11:40:17,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:17,229 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:17,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-13 11:40:17,230 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:17,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1791911393, now seen corresponding path program 1 times [2022-07-13 11:40:17,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:17,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419422722] [2022-07-13 11:40:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:17,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:40:17,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:17,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419422722] [2022-07-13 11:40:17,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419422722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:17,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:17,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:40:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507979733] [2022-07-13 11:40:17,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:17,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:40:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:40:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:40:17,424 INFO L87 Difference]: Start difference. First operand 1581 states and 2285 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:19,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:21,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:23,478 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 [] [2022-07-13 11:40:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:24,404 INFO L93 Difference]: Finished difference Result 3940 states and 5660 transitions. [2022-07-13 11:40:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:40:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-13 11:40:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:24,407 INFO L225 Difference]: With dead ends: 3940 [2022-07-13 11:40:24,407 INFO L226 Difference]: Without dead ends: 2382 [2022-07-13 11:40:24,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:40:24,408 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 325 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:24,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1073 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2022-07-13 11:40:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-07-13 11:40:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2186. [2022-07-13 11:40:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.440274599542334) internal successors, (3147), 2185 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 3147 transitions. [2022-07-13 11:40:24,463 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 3147 transitions. Word has length 251 [2022-07-13 11:40:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:24,463 INFO L495 AbstractCegarLoop]: Abstraction has 2186 states and 3147 transitions. [2022-07-13 11:40:24,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 3147 transitions. [2022-07-13 11:40:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-13 11:40:24,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:24,465 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:24,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-13 11:40:24,465 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 204295532, now seen corresponding path program 1 times [2022-07-13 11:40:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:24,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184203326] [2022-07-13 11:40:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-13 11:40:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184203326] [2022-07-13 11:40:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184203326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:24,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:24,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:40:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410762260] [2022-07-13 11:40:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:40:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:40:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:40:24,756 INFO L87 Difference]: Start difference. First operand 2186 states and 3147 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:26,762 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 [] [2022-07-13 11:40:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:27,212 INFO L93 Difference]: Finished difference Result 4733 states and 6784 transitions. [2022-07-13 11:40:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:40:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-07-13 11:40:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:27,215 INFO L225 Difference]: With dead ends: 4733 [2022-07-13 11:40:27,215 INFO L226 Difference]: Without dead ends: 2570 [2022-07-13 11:40:27,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:40:27,217 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 244 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:27,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 616 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:40:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2022-07-13 11:40:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2189. [2022-07-13 11:40:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4360146252285193) internal successors, (3142), 2188 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3142 transitions. [2022-07-13 11:40:27,273 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3142 transitions. Word has length 252 [2022-07-13 11:40:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:27,273 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 3142 transitions. [2022-07-13 11:40:27,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3142 transitions. [2022-07-13 11:40:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-13 11:40:27,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:27,276 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:27,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-13 11:40:27,276 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -502301074, now seen corresponding path program 1 times [2022-07-13 11:40:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532586983] [2022-07-13 11:40:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:40:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532586983] [2022-07-13 11:40:27,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532586983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:27,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:27,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:40:27,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134709389] [2022-07-13 11:40:27,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:40:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:40:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:40:27,540 INFO L87 Difference]: Start difference. First operand 2189 states and 3142 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:29,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:32,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:33,293 INFO L93 Difference]: Finished difference Result 5166 states and 7383 transitions. [2022-07-13 11:40:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:40:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-07-13 11:40:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:33,296 INFO L225 Difference]: With dead ends: 5166 [2022-07-13 11:40:33,296 INFO L226 Difference]: Without dead ends: 3000 [2022-07-13 11:40:33,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:40:33,298 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 324 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:33,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1076 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 834 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-07-13 11:40:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2022-07-13 11:40:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2189. [2022-07-13 11:40:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4360146252285193) internal successors, (3142), 2188 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3142 transitions. [2022-07-13 11:40:33,368 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3142 transitions. Word has length 252 [2022-07-13 11:40:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:33,368 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 3142 transitions. [2022-07-13 11:40:33,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3142 transitions. [2022-07-13 11:40:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-13 11:40:33,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:33,374 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-07-13 11:40:33,374 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1345889978, now seen corresponding path program 1 times [2022-07-13 11:40:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:33,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353875751] [2022-07-13 11:40:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:33,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-13 11:40:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:33,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353875751] [2022-07-13 11:40:33,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353875751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:33,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:33,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:40:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743083619] [2022-07-13 11:40:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:33,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:40:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:40:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:40:33,535 INFO L87 Difference]: Start difference. First operand 2189 states and 3142 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:35,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:37,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:38,204 INFO L93 Difference]: Finished difference Result 4894 states and 6988 transitions. [2022-07-13 11:40:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:40:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-13 11:40:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:38,207 INFO L225 Difference]: With dead ends: 4894 [2022-07-13 11:40:38,207 INFO L226 Difference]: Without dead ends: 2728 [2022-07-13 11:40:38,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:40:38,208 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 327 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:38,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 762 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-07-13 11:40:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-07-13 11:40:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2192. [2022-07-13 11:40:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4317663167503423) internal successors, (3137), 2191 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3137 transitions. [2022-07-13 11:40:38,264 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3137 transitions. Word has length 253 [2022-07-13 11:40:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:38,264 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3137 transitions. [2022-07-13 11:40:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3137 transitions. [2022-07-13 11:40:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-13 11:40:38,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:38,266 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:38,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-07-13 11:40:38,267 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1775548284, now seen corresponding path program 1 times [2022-07-13 11:40:38,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:38,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143382811] [2022-07-13 11:40:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 11:40:38,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143382811] [2022-07-13 11:40:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143382811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:38,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:38,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:40:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277745791] [2022-07-13 11:40:38,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:38,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:40:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:40:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:40:38,484 INFO L87 Difference]: Start difference. First operand 2192 states and 3137 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:40,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:42,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:40:44,536 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 [] [2022-07-13 11:40:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:45,370 INFO L93 Difference]: Finished difference Result 5162 states and 7360 transitions. [2022-07-13 11:40:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:40:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-13 11:40:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:45,373 INFO L225 Difference]: With dead ends: 5162 [2022-07-13 11:40:45,373 INFO L226 Difference]: Without dead ends: 2993 [2022-07-13 11:40:45,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:40:45,375 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 323 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1076 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-07-13 11:40:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-07-13 11:40:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2192. [2022-07-13 11:40:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4317663167503423) internal successors, (3137), 2191 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3137 transitions. [2022-07-13 11:40:45,443 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3137 transitions. Word has length 253 [2022-07-13 11:40:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:45,443 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3137 transitions. [2022-07-13 11:40:45,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3137 transitions. [2022-07-13 11:40:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-13 11:40:45,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:45,446 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:45,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-13 11:40:45,446 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:45,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1482178204, now seen corresponding path program 1 times [2022-07-13 11:40:45,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:45,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606560558] [2022-07-13 11:40:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-07-13 11:40:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606560558] [2022-07-13 11:40:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606560558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:40:45,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:40:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:40:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790622180] [2022-07-13 11:40:45,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:40:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:40:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:40:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:40:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:40:45,674 INFO L87 Difference]: Start difference. First operand 2192 states and 3137 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:47,681 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 [] [2022-07-13 11:40:49,704 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 [] [2022-07-13 11:40:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:40:49,984 INFO L93 Difference]: Finished difference Result 4381 states and 6270 transitions. [2022-07-13 11:40:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:40:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-07-13 11:40:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:40:49,987 INFO L225 Difference]: With dead ends: 4381 [2022-07-13 11:40:49,987 INFO L226 Difference]: Without dead ends: 2192 [2022-07-13 11:40:49,988 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 [2022-07-13 11:40:49,989 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:40:49,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 631 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:40:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-07-13 11:40:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2192. [2022-07-13 11:40:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4313099041533546) internal successors, (3136), 2191 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3136 transitions. [2022-07-13 11:40:50,066 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3136 transitions. Word has length 263 [2022-07-13 11:40:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:40:50,066 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3136 transitions. [2022-07-13 11:40:50,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:40:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3136 transitions. [2022-07-13 11:40:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-13 11:40:50,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:40:50,069 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-13 11:40:50,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-13 11:40:50,069 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:40:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:40:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2022-07-13 11:40:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:40:50,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837932758] [2022-07-13 11:40:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:40:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 313 proven. 242 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-13 11:40:51,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:40:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837932758] [2022-07-13 11:40:51,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837932758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:40:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694165987] [2022-07-13 11:40:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:40:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:40:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:40:51,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:40:51,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:40:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:40:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 191 conjunts are in the unsatisfiable core [2022-07-13 11:40:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:40:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:40:52,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 24 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12633 treesize of output 2535