./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.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_clnt.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 b0edcf84130f28de31dd252113e98a7277e8f803d45945a4e4ab5373cd867bd6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:34:03,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:34:03,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:34:03,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:34:03,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:34:03,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:34:03,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:34:03,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:34:03,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:34:03,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:34:03,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:34:03,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:34:03,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:34:03,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:34:03,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:34:03,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:34:03,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:34:03,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:34:03,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:34:03,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:34:03,531 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:34:03,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:34:03,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:34:03,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:34:03,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:34:03,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:34:03,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:34:03,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:34:03,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:34:03,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:34:03,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:34:03,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:34:03,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:34:03,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:34:03,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:34:03,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:34:03,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:34:03,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:34:03,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:34:03,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:34:03,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:34:03,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:34:03,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:34:03,587 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:34:03,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:34:03,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:34:03,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:34:03,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:34:03,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:34:03,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:34:03,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:34:03,590 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:34:03,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:34:03,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:34:03,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:34:03,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:34:03,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:34:03,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:34:03,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:34:03,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:34:03,593 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:34:03,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:34:03,594 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:34:03,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:34:03,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:34:03,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:34:03,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:34:03,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:34:03,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:34:03,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:34:03,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:34:03,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:34:03,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:34:03,597 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:34:03,598 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:34:03,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:34:03,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0edcf84130f28de31dd252113e98a7277e8f803d45945a4e4ab5373cd867bd6 [2022-07-13 11:34:03,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:34:03,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:34:03,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:34:03,846 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:34:03,847 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:34:03,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c [2022-07-13 11:34:03,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84364ded8/f2c848878c7644549bb16c8ce978041e/FLAGf593005c2 [2022-07-13 11:34:04,471 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:34:04,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c [2022-07-13 11:34:04,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84364ded8/f2c848878c7644549bb16c8ce978041e/FLAGf593005c2 [2022-07-13 11:34:04,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84364ded8/f2c848878c7644549bb16c8ce978041e [2022-07-13 11:34:04,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:34:04,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:34:04,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:34:04,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:34:04,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:34:04,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:34:04" (1/1) ... [2022-07-13 11:34:04,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e587b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:04, skipping insertion in model container [2022-07-13 11:34:04,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:34:04" (1/1) ... [2022-07-13 11:34:04,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:34:04,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:34:05,142 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_clnt.blast.02.i.cil-2.c[65398,65411] [2022-07-13 11:34:05,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:34:05,183 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:34:05,331 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_clnt.blast.02.i.cil-2.c[65398,65411] [2022-07-13 11:34:05,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:34:05,365 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:34:05,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05 WrapperNode [2022-07-13 11:34:05,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:34:05,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:34:05,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:34:05,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:34:05,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,461 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2022-07-13 11:34:05,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:34:05,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:34:05,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:34:05,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:34:05,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:34:05,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:34:05,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:34:05,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:34:05,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (1/1) ... [2022-07-13 11:34:05,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:34:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:34:05,609 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 11:34:05,633 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 11:34:05,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:34:05,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 11:34:05,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:34:05,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:34:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 11:34:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:34:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:34:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:34:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:34:05,798 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:34:05,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:34:05,812 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:34:08,673 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2022-07-13 11:34:08,687 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2022-07-13 11:34:08,687 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:34:08,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:34:08,694 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:34:08,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:34:08 BoogieIcfgContainer [2022-07-13 11:34:08,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:34:08,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:34:08,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:34:08,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:34:08,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:34:04" (1/3) ... [2022-07-13 11:34:08,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd838e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:34:08, skipping insertion in model container [2022-07-13 11:34:08,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:34:05" (2/3) ... [2022-07-13 11:34:08,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd838e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:34:08, skipping insertion in model container [2022-07-13 11:34:08,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:34:08" (3/3) ... [2022-07-13 11:34:08,717 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-2.c [2022-07-13 11:34:08,743 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:34:08,743 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:34:08,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:34:08,795 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@2a213998, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b9aa440 [2022-07-13 11:34:08,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:34:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:34:08,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:08,807 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] [2022-07-13 11:34:08,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2022-07-13 11:34:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:08,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887152248] [2022-07-13 11:34:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:09,479 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 11:34:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887152248] [2022-07-13 11:34:09,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887152248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:09,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:09,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:09,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188734168] [2022-07-13 11:34:09,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:09,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:09,523 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 11:34:11,554 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 11:34:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:11,820 INFO L93 Difference]: Finished difference Result 255 states and 430 transitions. [2022-07-13 11:34:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 11:34:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:11,831 INFO L225 Difference]: With dead ends: 255 [2022-07-13 11:34:11,832 INFO L226 Difference]: Without dead ends: 116 [2022-07-13 11:34:11,834 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 11:34:11,840 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 7 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:11,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 530 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:34:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-13 11:34:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-07-13 11:34:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 172 transitions. [2022-07-13 11:34:11,889 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 172 transitions. Word has length 24 [2022-07-13 11:34:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:11,889 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 172 transitions. [2022-07-13 11:34:11,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 11:34:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 172 transitions. [2022-07-13 11:34:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 11:34:11,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:11,890 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] [2022-07-13 11:34:11,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:34:11,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:11,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1001988123, now seen corresponding path program 1 times [2022-07-13 11:34:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375078040] [2022-07-13 11:34:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:34:12,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:12,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375078040] [2022-07-13 11:34:12,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375078040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:12,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:12,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:34:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157069947] [2022-07-13 11:34:12,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:34:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:34:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:12,195 INFO L87 Difference]: Start difference. First operand 115 states and 172 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 11:34:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:12,252 INFO L93 Difference]: Finished difference Result 320 states and 482 transitions. [2022-07-13 11:34:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:34:12,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-13 11:34:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:12,259 INFO L225 Difference]: With dead ends: 320 [2022-07-13 11:34:12,260 INFO L226 Difference]: Without dead ends: 215 [2022-07-13 11:34:12,261 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 11:34:12,265 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 123 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:12,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 311 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:34:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-13 11:34:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-07-13 11:34:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4906542056074767) internal successors, (319), 214 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 11:34:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 319 transitions. [2022-07-13 11:34:12,287 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 319 transitions. Word has length 38 [2022-07-13 11:34:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:12,287 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 319 transitions. [2022-07-13 11:34:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 11:34:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 319 transitions. [2022-07-13 11:34:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:34:12,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:12,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:12,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:34:12,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash 996888307, now seen corresponding path program 1 times [2022-07-13 11:34:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:12,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825714158] [2022-07-13 11:34:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:34:12,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:12,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825714158] [2022-07-13 11:34:12,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825714158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:12,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:12,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:34:12,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727647347] [2022-07-13 11:34:12,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:34:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:34:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:12,570 INFO L87 Difference]: Start difference. First operand 215 states and 319 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:14,584 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 11:34:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:14,628 INFO L93 Difference]: Finished difference Result 420 states and 630 transitions. [2022-07-13 11:34:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:34:14,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 11:34:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:14,631 INFO L225 Difference]: With dead ends: 420 [2022-07-13 11:34:14,631 INFO L226 Difference]: Without dead ends: 315 [2022-07-13 11:34:14,632 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 11:34:14,633 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 124 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:14,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 460 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:34:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-13 11:34:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2022-07-13 11:34:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.484076433121019) internal successors, (466), 314 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 11:34:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 466 transitions. [2022-07-13 11:34:14,663 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 466 transitions. Word has length 53 [2022-07-13 11:34:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:14,663 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 466 transitions. [2022-07-13 11:34:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 466 transitions. [2022-07-13 11:34:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 11:34:14,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:14,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:14,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:34:14,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:14,673 INFO L85 PathProgramCache]: Analyzing trace with hash -973367758, now seen corresponding path program 1 times [2022-07-13 11:34:14,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:14,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45009411] [2022-07-13 11:34:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45009411] [2022-07-13 11:34:14,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45009411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:14,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:14,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:14,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901934976] [2022-07-13 11:34:14,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:14,948 INFO L87 Difference]: Start difference. First operand 315 states and 466 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:16,960 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 11:34:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:17,350 INFO L93 Difference]: Finished difference Result 891 states and 1325 transitions. [2022-07-13 11:34:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-13 11:34:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:17,363 INFO L225 Difference]: With dead ends: 891 [2022-07-13 11:34:17,363 INFO L226 Difference]: Without dead ends: 586 [2022-07-13 11:34:17,365 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 11:34:17,365 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:17,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 265 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 11:34:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-13 11:34:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 387. [2022-07-13 11:34:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5336787564766838) internal successors, (592), 386 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 11:34:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 592 transitions. [2022-07-13 11:34:17,387 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 592 transitions. Word has length 71 [2022-07-13 11:34:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:17,387 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 592 transitions. [2022-07-13 11:34:17,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 592 transitions. [2022-07-13 11:34:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:34:17,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:17,389 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:17,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:34:17,389 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash -114315255, now seen corresponding path program 1 times [2022-07-13 11:34:17,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529466872] [2022-07-13 11:34:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:17,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:17,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:17,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529466872] [2022-07-13 11:34:17,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529466872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:17,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:17,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:17,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287604901] [2022-07-13 11:34:17,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:17,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:17,618 INFO L87 Difference]: Start difference. First operand 387 states and 592 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:19,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:21,642 WARN L534 Checker$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 11:34:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:21,993 INFO L93 Difference]: Finished difference Result 941 states and 1438 transitions. [2022-07-13 11:34:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:21,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-13 11:34:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:21,996 INFO L225 Difference]: With dead ends: 941 [2022-07-13 11:34:21,996 INFO L226 Difference]: Without dead ends: 564 [2022-07-13 11:34:21,997 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 11:34:21,998 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 91 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:21,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-13 11:34:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 439. [2022-07-13 11:34:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 11:34:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2022-07-13 11:34:22,024 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 72 [2022-07-13 11:34:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:22,025 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2022-07-13 11:34:22,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2022-07-13 11:34:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 11:34:22,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:22,027 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:22,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:34:22,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash 26233355, now seen corresponding path program 1 times [2022-07-13 11:34:22,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:22,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294755808] [2022-07-13 11:34:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:22,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294755808] [2022-07-13 11:34:22,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294755808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:22,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:22,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146558316] [2022-07-13 11:34:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:22,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:22,302 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:24,311 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 11:34:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:24,643 INFO L93 Difference]: Finished difference Result 1139 states and 1753 transitions. [2022-07-13 11:34:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:24,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-13 11:34:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:24,647 INFO L225 Difference]: With dead ends: 1139 [2022-07-13 11:34:24,647 INFO L226 Difference]: Without dead ends: 710 [2022-07-13 11:34:24,648 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 11:34:24,649 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:24,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:34:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-07-13 11:34:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 462. [2022-07-13 11:34:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.5704989154013016) internal successors, (724), 461 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2022-07-13 11:34:24,663 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 72 [2022-07-13 11:34:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:24,664 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2022-07-13 11:34:24,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2022-07-13 11:34:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 11:34:24,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:24,667 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:24,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:34:24,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1848863885, now seen corresponding path program 1 times [2022-07-13 11:34:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:24,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937682229] [2022-07-13 11:34:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937682229] [2022-07-13 11:34:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937682229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:24,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:24,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828093202] [2022-07-13 11:34:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:24,880 INFO L87 Difference]: Start difference. First operand 462 states and 724 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 11:34:26,894 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 11:34:28,912 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 11:34:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:29,246 INFO L93 Difference]: Finished difference Result 1091 states and 1700 transitions. [2022-07-13 11:34:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:29,247 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 92 [2022-07-13 11:34:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:29,249 INFO L225 Difference]: With dead ends: 1091 [2022-07-13 11:34:29,249 INFO L226 Difference]: Without dead ends: 639 [2022-07-13 11:34:29,250 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 11:34:29,251 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 93 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:29,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-13 11:34:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 508. [2022-07-13 11:34:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.581854043392505) internal successors, (802), 507 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 11:34:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 802 transitions. [2022-07-13 11:34:29,265 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 802 transitions. Word has length 92 [2022-07-13 11:34:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:29,265 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 802 transitions. [2022-07-13 11:34:29,266 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 11:34:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 802 transitions. [2022-07-13 11:34:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 11:34:29,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:29,267 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:29,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:34:29,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1552617073, now seen corresponding path program 1 times [2022-07-13 11:34:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:29,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039286215] [2022-07-13 11:34:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 11:34:29,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039286215] [2022-07-13 11:34:29,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039286215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:29,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:29,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:29,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946695240] [2022-07-13 11:34:29,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:29,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:29,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:29,450 INFO L87 Difference]: Start difference. First operand 508 states and 802 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:31,459 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 11:34:33,476 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 11:34:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:33,735 INFO L93 Difference]: Finished difference Result 1091 states and 1717 transitions. [2022-07-13 11:34:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-13 11:34:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:33,739 INFO L225 Difference]: With dead ends: 1091 [2022-07-13 11:34:33,739 INFO L226 Difference]: Without dead ends: 593 [2022-07-13 11:34:33,740 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 11:34:33,741 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 40 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:33,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 494 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-13 11:34:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 548. [2022-07-13 11:34:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5904936014625228) internal successors, (870), 547 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 11:34:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 870 transitions. [2022-07-13 11:34:33,756 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 870 transitions. Word has length 92 [2022-07-13 11:34:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:33,756 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 870 transitions. [2022-07-13 11:34:33,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 870 transitions. [2022-07-13 11:34:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 11:34:33,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:33,759 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:34:33,759 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1859686006, now seen corresponding path program 1 times [2022-07-13 11:34:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544846330] [2022-07-13 11:34:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:33,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:33,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544846330] [2022-07-13 11:34:33,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544846330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:33,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:33,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395130969] [2022-07-13 11:34:33,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:33,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:33,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:33,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:33,966 INFO L87 Difference]: Start difference. First operand 548 states and 870 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 11:34:35,976 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 11:34:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:36,280 INFO L93 Difference]: Finished difference Result 1282 states and 1998 transitions. [2022-07-13 11:34:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:36,281 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 93 [2022-07-13 11:34:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:36,284 INFO L225 Difference]: With dead ends: 1282 [2022-07-13 11:34:36,284 INFO L226 Difference]: Without dead ends: 744 [2022-07-13 11:34:36,285 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 11:34:36,285 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 108 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:36,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:34:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-07-13 11:34:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 548. [2022-07-13 11:34:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5795246800731262) internal successors, (864), 547 states have internal predecessors, (864), 0 states have call successors, (0), 0 states 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 11:34:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 864 transitions. [2022-07-13 11:34:36,334 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 864 transitions. Word has length 93 [2022-07-13 11:34:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:36,335 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 864 transitions. [2022-07-13 11:34:36,335 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 11:34:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 864 transitions. [2022-07-13 11:34:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 11:34:36,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:36,336 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:36,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:34:36,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:36,338 INFO L85 PathProgramCache]: Analyzing trace with hash 500641909, now seen corresponding path program 2 times [2022-07-13 11:34:36,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:36,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304570832] [2022-07-13 11:34:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:36,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:36,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304570832] [2022-07-13 11:34:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304570832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:36,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781470876] [2022-07-13 11:34:36,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:36,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:36,553 INFO L87 Difference]: Start difference. First operand 548 states and 864 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:38,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:40,593 WARN L534 Checker$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 11:34:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:40,934 INFO L93 Difference]: Finished difference Result 1279 states and 1983 transitions. [2022-07-13 11:34:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-13 11:34:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:40,938 INFO L225 Difference]: With dead ends: 1279 [2022-07-13 11:34:40,938 INFO L226 Difference]: Without dead ends: 741 [2022-07-13 11:34:40,939 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 11:34:40,940 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 111 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:40,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 282 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-07-13 11:34:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 548. [2022-07-13 11:34:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5612431444241317) internal successors, (854), 547 states have internal predecessors, (854), 0 states have call successors, (0), 0 states 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 11:34:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 854 transitions. [2022-07-13 11:34:40,963 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 854 transitions. Word has length 106 [2022-07-13 11:34:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:40,963 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 854 transitions. [2022-07-13 11:34:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 854 transitions. [2022-07-13 11:34:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 11:34:40,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:40,978 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:40,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:34:40,978 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1117113491, now seen corresponding path program 1 times [2022-07-13 11:34:40,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:40,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703588666] [2022-07-13 11:34:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:41,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:41,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703588666] [2022-07-13 11:34:41,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703588666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:41,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:41,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:41,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574016927] [2022-07-13 11:34:41,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:41,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:41,200 INFO L87 Difference]: Start difference. First operand 548 states and 854 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:43,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:45,223 WARN L534 Checker$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 11:34:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:45,553 INFO L93 Difference]: Finished difference Result 1209 states and 1869 transitions. [2022-07-13 11:34:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-13 11:34:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:45,557 INFO L225 Difference]: With dead ends: 1209 [2022-07-13 11:34:45,557 INFO L226 Difference]: Without dead ends: 671 [2022-07-13 11:34:45,558 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 11:34:45,559 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 97 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:45,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 538 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-07-13 11:34:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 548. [2022-07-13 11:34:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5575868372943327) internal successors, (852), 547 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 852 transitions. [2022-07-13 11:34:45,576 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 852 transitions. Word has length 106 [2022-07-13 11:34:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:45,576 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 852 transitions. [2022-07-13 11:34:45,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 852 transitions. [2022-07-13 11:34:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 11:34:45,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:45,579 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:34:45,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1677813269, now seen corresponding path program 1 times [2022-07-13 11:34:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164945548] [2022-07-13 11:34:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:45,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164945548] [2022-07-13 11:34:45,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164945548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:45,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:45,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:45,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901485786] [2022-07-13 11:34:45,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:45,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:45,768 INFO L87 Difference]: Start difference. First operand 548 states and 852 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:47,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:49,802 WARN L534 Checker$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 11:34:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:50,049 INFO L93 Difference]: Finished difference Result 1129 states and 1745 transitions. [2022-07-13 11:34:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-13 11:34:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:50,052 INFO L225 Difference]: With dead ends: 1129 [2022-07-13 11:34:50,052 INFO L226 Difference]: Without dead ends: 591 [2022-07-13 11:34:50,053 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 11:34:50,054 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 46 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:50,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 492 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-07-13 11:34:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 548. [2022-07-13 11:34:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5539305301645339) internal successors, (850), 547 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 850 transitions. [2022-07-13 11:34:50,070 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 850 transitions. Word has length 106 [2022-07-13 11:34:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:50,070 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 850 transitions. [2022-07-13 11:34:50,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 850 transitions. [2022-07-13 11:34:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-13 11:34:50,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:50,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:50,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:34:50,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:50,074 INFO L85 PathProgramCache]: Analyzing trace with hash -602992740, now seen corresponding path program 1 times [2022-07-13 11:34:50,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:50,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868125369] [2022-07-13 11:34:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:50,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:50,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:50,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868125369] [2022-07-13 11:34:50,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868125369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:50,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:50,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2720717] [2022-07-13 11:34:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:50,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:50,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:50,301 INFO L87 Difference]: Start difference. First operand 548 states and 850 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:52,311 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 11:34:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:52,661 INFO L93 Difference]: Finished difference Result 1280 states and 1956 transitions. [2022-07-13 11:34:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-07-13 11:34:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:52,665 INFO L225 Difference]: With dead ends: 1280 [2022-07-13 11:34:52,665 INFO L226 Difference]: Without dead ends: 742 [2022-07-13 11:34:52,666 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 11:34:52,667 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:52,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 290 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:34:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-07-13 11:34:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 548. [2022-07-13 11:34:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5356489945155394) internal successors, (840), 547 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 11:34:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 840 transitions. [2022-07-13 11:34:52,684 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 840 transitions. Word has length 107 [2022-07-13 11:34:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:52,685 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 840 transitions. [2022-07-13 11:34:52,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 840 transitions. [2022-07-13 11:34:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-13 11:34:52,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:52,687 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:52,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:34:52,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1332849040, now seen corresponding path program 1 times [2022-07-13 11:34:52,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:52,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613369745] [2022-07-13 11:34:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613369745] [2022-07-13 11:34:52,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613369745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:52,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:52,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:52,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25037915] [2022-07-13 11:34:52,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:52,893 INFO L87 Difference]: Start difference. First operand 548 states and 840 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:54,903 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 11:34:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:55,231 INFO L93 Difference]: Finished difference Result 1361 states and 2062 transitions. [2022-07-13 11:34:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-07-13 11:34:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:55,235 INFO L225 Difference]: With dead ends: 1361 [2022-07-13 11:34:55,235 INFO L226 Difference]: Without dead ends: 823 [2022-07-13 11:34:55,237 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 11:34:55,237 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:55,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 266 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:34:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-07-13 11:34:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 662. [2022-07-13 11:34:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5567322239031771) internal successors, (1029), 661 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 11:34:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1029 transitions. [2022-07-13 11:34:55,257 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1029 transitions. Word has length 107 [2022-07-13 11:34:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:55,258 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1029 transitions. [2022-07-13 11:34:55,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1029 transitions. [2022-07-13 11:34:55,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-13 11:34:55,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:55,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:55,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:34:55,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1015692680, now seen corresponding path program 1 times [2022-07-13 11:34:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:55,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240734820] [2022-07-13 11:34:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:55,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:55,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240734820] [2022-07-13 11:34:55,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240734820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:55,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:55,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538220044] [2022-07-13 11:34:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:55,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:55,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:55,443 INFO L87 Difference]: Start difference. First operand 662 states and 1029 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 11:34:57,453 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 11:34:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:57,755 INFO L93 Difference]: Finished difference Result 1508 states and 2314 transitions. [2022-07-13 11:34:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:57,756 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 108 [2022-07-13 11:34:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:57,760 INFO L225 Difference]: With dead ends: 1508 [2022-07-13 11:34:57,760 INFO L226 Difference]: Without dead ends: 856 [2022-07-13 11:34:57,761 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 11:34:57,762 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 115 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:57,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:34:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-07-13 11:34:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 662. [2022-07-13 11:34:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5370650529500756) internal successors, (1016), 661 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 11:34:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1016 transitions. [2022-07-13 11:34:57,783 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1016 transitions. Word has length 108 [2022-07-13 11:34:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:57,784 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1016 transitions. [2022-07-13 11:34:57,784 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 11:34:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1016 transitions. [2022-07-13 11:34:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-13 11:34:57,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:57,786 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:34:57,787 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash -805941339, now seen corresponding path program 1 times [2022-07-13 11:34:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:57,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237252124] [2022-07-13 11:34:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237252124] [2022-07-13 11:34:57,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237252124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:57,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:57,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:57,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049378126] [2022-07-13 11:34:57,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:57,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:57,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:57,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:57,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:57,977 INFO L87 Difference]: Start difference. First operand 662 states and 1016 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 11:34:59,991 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 11:35:02,007 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 11:35:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:02,336 INFO L93 Difference]: Finished difference Result 1209 states and 1841 transitions. [2022-07-13 11:35:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:02,336 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 108 [2022-07-13 11:35:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:02,339 INFO L225 Difference]: With dead ends: 1209 [2022-07-13 11:35:02,339 INFO L226 Difference]: Without dead ends: 785 [2022-07-13 11:35:02,340 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 11:35:02,341 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 89 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:02,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 532 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:35:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-13 11:35:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 662. [2022-07-13 11:35:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5340393343419063) internal successors, (1014), 661 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 11:35:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1014 transitions. [2022-07-13 11:35:02,358 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1014 transitions. Word has length 108 [2022-07-13 11:35:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:02,358 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1014 transitions. [2022-07-13 11:35:02,359 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 11:35:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1014 transitions. [2022-07-13 11:35:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-13 11:35:02,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:02,361 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:35:02,361 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -82572025, now seen corresponding path program 1 times [2022-07-13 11:35:02,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:02,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288727316] [2022-07-13 11:35:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:35:02,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288727316] [2022-07-13 11:35:02,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288727316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:02,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:02,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:02,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714448880] [2022-07-13 11:35:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:02,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:02,536 INFO L87 Difference]: Start difference. First operand 662 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:04,546 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 11:35:06,565 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 11:35:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:06,855 INFO L93 Difference]: Finished difference Result 1433 states and 2183 transitions. [2022-07-13 11:35:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-13 11:35:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:06,858 INFO L225 Difference]: With dead ends: 1433 [2022-07-13 11:35:06,859 INFO L226 Difference]: Without dead ends: 781 [2022-07-13 11:35:06,860 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 11:35:06,860 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 66 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:06,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 528 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:35:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-07-13 11:35:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 692. [2022-07-13 11:35:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.539797395079595) internal successors, (1064), 691 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 11:35:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1064 transitions. [2022-07-13 11:35:06,891 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1064 transitions. Word has length 108 [2022-07-13 11:35:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:06,891 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1064 transitions. [2022-07-13 11:35:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1064 transitions. [2022-07-13 11:35:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-13 11:35:06,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:06,894 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:06,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:35:06,894 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 803875412, now seen corresponding path program 1 times [2022-07-13 11:35:06,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:06,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660007228] [2022-07-13 11:35:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:06,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:35:07,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660007228] [2022-07-13 11:35:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660007228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:07,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:07,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477763172] [2022-07-13 11:35:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:07,076 INFO L87 Difference]: Start difference. First operand 692 states and 1064 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:09,086 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 11:35:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:09,363 INFO L93 Difference]: Finished difference Result 1568 states and 2384 transitions. [2022-07-13 11:35:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-13 11:35:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:09,368 INFO L225 Difference]: With dead ends: 1568 [2022-07-13 11:35:09,368 INFO L226 Difference]: Without dead ends: 886 [2022-07-13 11:35:09,369 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 11:35:09,370 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 90 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:09,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:35:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-13 11:35:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 731. [2022-07-13 11:35:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5602739726027397) internal successors, (1139), 730 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 11:35:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1139 transitions. [2022-07-13 11:35:09,390 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1139 transitions. Word has length 108 [2022-07-13 11:35:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:09,391 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1139 transitions. [2022-07-13 11:35:09,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1139 transitions. [2022-07-13 11:35:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-13 11:35:09,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:09,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:09,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:35:09,394 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1155633319, now seen corresponding path program 1 times [2022-07-13 11:35:09,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:09,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98128175] [2022-07-13 11:35:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:09,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:35:09,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98128175] [2022-07-13 11:35:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98128175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:09,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:09,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:09,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013003383] [2022-07-13 11:35:09,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:09,563 INFO L87 Difference]: Start difference. First operand 731 states and 1139 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 11:35:11,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:13,596 WARN L534 Checker$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 11:35:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:13,778 INFO L93 Difference]: Finished difference Result 1239 states and 1920 transitions. [2022-07-13 11:35:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:13,779 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 108 [2022-07-13 11:35:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:13,782 INFO L225 Difference]: With dead ends: 1239 [2022-07-13 11:35:13,782 INFO L226 Difference]: Without dead ends: 774 [2022-07-13 11:35:13,783 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 11:35:13,783 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 39 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:13,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 486 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-07-13 11:35:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 731. [2022-07-13 11:35:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5575342465753426) internal successors, (1137), 730 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states 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 11:35:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1137 transitions. [2022-07-13 11:35:13,803 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1137 transitions. Word has length 108 [2022-07-13 11:35:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:13,804 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1137 transitions. [2022-07-13 11:35:13,804 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 11:35:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1137 transitions. [2022-07-13 11:35:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:35:13,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:13,806 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:13,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:35:13,806 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash 446496737, now seen corresponding path program 1 times [2022-07-13 11:35:13,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:13,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088880462] [2022-07-13 11:35:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:35:13,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:13,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088880462] [2022-07-13 11:35:13,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088880462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:13,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:13,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755373806] [2022-07-13 11:35:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:13,999 INFO L87 Difference]: Start difference. First operand 731 states and 1137 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 11:35:16,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:18,026 WARN L534 Checker$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 11:35:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:18,263 INFO L93 Difference]: Finished difference Result 1523 states and 2353 transitions. [2022-07-13 11:35:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:18,263 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 109 [2022-07-13 11:35:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:18,266 INFO L225 Difference]: With dead ends: 1523 [2022-07-13 11:35:18,266 INFO L226 Difference]: Without dead ends: 802 [2022-07-13 11:35:18,268 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 11:35:18,268 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 79 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:18,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 510 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-07-13 11:35:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 731. [2022-07-13 11:35:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5547945205479452) internal successors, (1135), 730 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 11:35:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1135 transitions. [2022-07-13 11:35:18,289 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1135 transitions. Word has length 109 [2022-07-13 11:35:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:18,290 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1135 transitions. [2022-07-13 11:35:18,290 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 11:35:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1135 transitions. [2022-07-13 11:35:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:35:18,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:18,292 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:18,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 11:35:18,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash -585249362, now seen corresponding path program 1 times [2022-07-13 11:35:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70507778] [2022-07-13 11:35:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:35:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70507778] [2022-07-13 11:35:18,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70507778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:18,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:18,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508953316] [2022-07-13 11:35:18,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:18,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:18,453 INFO L87 Difference]: Start difference. First operand 731 states and 1135 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 11:35:20,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:22,488 WARN L534 Checker$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 11:35:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:22,722 INFO L93 Difference]: Finished difference Result 1260 states and 1943 transitions. [2022-07-13 11:35:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:22,723 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 109 [2022-07-13 11:35:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:22,726 INFO L225 Difference]: With dead ends: 1260 [2022-07-13 11:35:22,726 INFO L226 Difference]: Without dead ends: 795 [2022-07-13 11:35:22,727 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 11:35:22,728 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 72 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:22,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 502 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-07-13 11:35:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 731. [2022-07-13 11:35:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5520547945205478) internal successors, (1133), 730 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states 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 11:35:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1133 transitions. [2022-07-13 11:35:22,757 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1133 transitions. Word has length 109 [2022-07-13 11:35:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:22,757 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1133 transitions. [2022-07-13 11:35:22,757 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 11:35:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1133 transitions. [2022-07-13 11:35:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:35:22,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:22,759 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:22,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:35:22,760 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 147177277, now seen corresponding path program 1 times [2022-07-13 11:35:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543202943] [2022-07-13 11:35:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:35:22,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543202943] [2022-07-13 11:35:22,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543202943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:22,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:22,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777649758] [2022-07-13 11:35:22,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:22,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:22,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:22,918 INFO L87 Difference]: Start difference. First operand 731 states and 1133 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:24,927 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 11:35:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:25,222 INFO L93 Difference]: Finished difference Result 1601 states and 2438 transitions. [2022-07-13 11:35:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-13 11:35:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:25,227 INFO L225 Difference]: With dead ends: 1601 [2022-07-13 11:35:25,228 INFO L226 Difference]: Without dead ends: 880 [2022-07-13 11:35:25,229 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 11:35:25,229 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 87 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:25,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 266 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:35:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-13 11:35:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 734. [2022-07-13 11:35:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5497953615279672) internal successors, (1136), 733 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 11:35:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1136 transitions. [2022-07-13 11:35:25,251 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1136 transitions. Word has length 109 [2022-07-13 11:35:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:25,251 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1136 transitions. [2022-07-13 11:35:25,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1136 transitions. [2022-07-13 11:35:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:35:25,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:25,253 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:25,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:35:25,253 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1125768991, now seen corresponding path program 1 times [2022-07-13 11:35:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:25,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929697254] [2022-07-13 11:35:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:35:25,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929697254] [2022-07-13 11:35:25,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929697254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:25,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:25,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:25,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64804559] [2022-07-13 11:35:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:25,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:25,435 INFO L87 Difference]: Start difference. First operand 734 states and 1136 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 11:35:27,446 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 11:35:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:27,706 INFO L93 Difference]: Finished difference Result 1604 states and 2438 transitions. [2022-07-13 11:35:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:27,706 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 109 [2022-07-13 11:35:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:27,708 INFO L225 Difference]: With dead ends: 1604 [2022-07-13 11:35:27,709 INFO L226 Difference]: Without dead ends: 880 [2022-07-13 11:35:27,710 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 11:35:27,710 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:27,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 266 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:35:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-13 11:35:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 734. [2022-07-13 11:35:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.534788540245566) internal successors, (1125), 733 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states 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 11:35:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1125 transitions. [2022-07-13 11:35:27,731 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1125 transitions. Word has length 109 [2022-07-13 11:35:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:27,732 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1125 transitions. [2022-07-13 11:35:27,732 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 11:35:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1125 transitions. [2022-07-13 11:35:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:35:27,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:27,734 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:27,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:35:27,734 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:27,735 INFO L85 PathProgramCache]: Analyzing trace with hash 94022892, now seen corresponding path program 1 times [2022-07-13 11:35:27,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:27,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275242691] [2022-07-13 11:35:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:27,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:35:27,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275242691] [2022-07-13 11:35:27,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275242691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:27,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:27,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203433843] [2022-07-13 11:35:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:27,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:27,894 INFO L87 Difference]: Start difference. First operand 734 states and 1125 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 11:35:29,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:31,924 WARN L534 Checker$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 11:35:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:32,091 INFO L93 Difference]: Finished difference Result 1219 states and 1867 transitions. [2022-07-13 11:35:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:32,092 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 109 [2022-07-13 11:35:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:32,094 INFO L225 Difference]: With dead ends: 1219 [2022-07-13 11:35:32,094 INFO L226 Difference]: Without dead ends: 752 [2022-07-13 11:35:32,095 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 11:35:32,095 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 25 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:32,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 462 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-13 11:35:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 734. [2022-07-13 11:35:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5320600272851297) internal successors, (1123), 733 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states 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 11:35:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1123 transitions. [2022-07-13 11:35:32,137 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1123 transitions. Word has length 109 [2022-07-13 11:35:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:32,137 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1123 transitions. [2022-07-13 11:35:32,137 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 11:35:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1123 transitions. [2022-07-13 11:35:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 11:35:32,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:32,139 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:32,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:35:32,140 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1469182628, now seen corresponding path program 1 times [2022-07-13 11:35:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:32,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258946937] [2022-07-13 11:35:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:32,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:35:32,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:32,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258946937] [2022-07-13 11:35:32,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258946937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:32,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:32,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:32,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517551732] [2022-07-13 11:35:32,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:32,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:32,336 INFO L87 Difference]: Start difference. First operand 734 states and 1123 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:34,344 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 11:35:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:34,609 INFO L93 Difference]: Finished difference Result 1604 states and 2412 transitions. [2022-07-13 11:35:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:34,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-13 11:35:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:34,611 INFO L225 Difference]: With dead ends: 1604 [2022-07-13 11:35:34,612 INFO L226 Difference]: Without dead ends: 880 [2022-07-13 11:35:34,612 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 11:35:34,613 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 104 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:34,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 272 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:35:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-13 11:35:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 734. [2022-07-13 11:35:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5170532060027284) internal successors, (1112), 733 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 11:35:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1112 transitions. [2022-07-13 11:35:34,634 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1112 transitions. Word has length 110 [2022-07-13 11:35:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:34,635 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1112 transitions. [2022-07-13 11:35:34,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1112 transitions. [2022-07-13 11:35:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 11:35:34,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:34,637 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:34,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 11:35:34,637 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 797770585, now seen corresponding path program 1 times [2022-07-13 11:35:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142223739] [2022-07-13 11:35:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:35:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142223739] [2022-07-13 11:35:34,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142223739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:34,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:34,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191860632] [2022-07-13 11:35:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:34,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:34,836 INFO L87 Difference]: Start difference. First operand 734 states and 1112 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:36,845 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 11:35:38,864 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 11:35:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:39,120 INFO L93 Difference]: Finished difference Result 1508 states and 2274 transitions. [2022-07-13 11:35:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:39,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-13 11:35:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:39,124 INFO L225 Difference]: With dead ends: 1508 [2022-07-13 11:35:39,125 INFO L226 Difference]: Without dead ends: 784 [2022-07-13 11:35:39,125 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 11:35:39,126 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 41 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:39,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 490 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:35:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-07-13 11:35:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 740. [2022-07-13 11:35:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.5128552097428958) internal successors, (1118), 739 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states 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 11:35:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1118 transitions. [2022-07-13 11:35:39,147 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1118 transitions. Word has length 110 [2022-07-13 11:35:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:39,148 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1118 transitions. [2022-07-13 11:35:39,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1118 transitions. [2022-07-13 11:35:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 11:35:39,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:39,150 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 11:35:39,150 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1886579234, now seen corresponding path program 1 times [2022-07-13 11:35:39,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:39,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504770750] [2022-07-13 11:35:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:35:39,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504770750] [2022-07-13 11:35:39,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504770750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:39,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:39,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:35:39,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319135137] [2022-07-13 11:35:39,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:39,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:35:39,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:39,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:35:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:35:39,331 INFO L87 Difference]: Start difference. First operand 740 states and 1118 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:41,339 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 11:35:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:41,388 INFO L93 Difference]: Finished difference Result 1472 states and 2231 transitions. [2022-07-13 11:35:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:35:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-13 11:35:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:41,391 INFO L225 Difference]: With dead ends: 1472 [2022-07-13 11:35:41,391 INFO L226 Difference]: Without dead ends: 1004 [2022-07-13 11:35:41,392 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 11:35:41,393 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 124 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:41,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 468 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:35:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-07-13 11:35:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1004. [2022-07-13 11:35:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.5094715852442673) internal successors, (1514), 1003 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states 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 11:35:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1514 transitions. [2022-07-13 11:35:41,418 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1514 transitions. Word has length 110 [2022-07-13 11:35:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:41,418 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 1514 transitions. [2022-07-13 11:35:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1514 transitions. [2022-07-13 11:35:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 11:35:41,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:41,421 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:41,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 11:35:41,422 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -761801560, now seen corresponding path program 1 times [2022-07-13 11:35:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:41,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071945050] [2022-07-13 11:35:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 11:35:41,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071945050] [2022-07-13 11:35:41,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071945050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:41,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:41,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:35:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670458965] [2022-07-13 11:35:41,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:41,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:35:41,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:35:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:35:41,589 INFO L87 Difference]: Start difference. First operand 1004 states and 1514 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:43,600 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 11:35:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:43,658 INFO L93 Difference]: Finished difference Result 1999 states and 3021 transitions. [2022-07-13 11:35:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:35:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-13 11:35:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:43,663 INFO L225 Difference]: With dead ends: 1999 [2022-07-13 11:35:43,664 INFO L226 Difference]: Without dead ends: 1267 [2022-07-13 11:35:43,665 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 11:35:43,665 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 125 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:43,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 467 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:35:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-07-13 11:35:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1267. [2022-07-13 11:35:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 1.5071090047393365) internal successors, (1908), 1266 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 11:35:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1908 transitions. [2022-07-13 11:35:43,694 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1908 transitions. Word has length 112 [2022-07-13 11:35:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:43,694 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 1908 transitions. [2022-07-13 11:35:43,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1908 transitions. [2022-07-13 11:35:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 11:35:43,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:43,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 11:35:43,697 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash -621252950, now seen corresponding path program 1 times [2022-07-13 11:35:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:43,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936716620] [2022-07-13 11:35:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:43,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:35:43,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936716620] [2022-07-13 11:35:43,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936716620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:43,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:43,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:35:43,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503423700] [2022-07-13 11:35:43,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:43,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:35:43,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:35:43,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:35:43,867 INFO L87 Difference]: Start difference. First operand 1267 states and 1908 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:45,875 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 11:35:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:45,946 INFO L93 Difference]: Finished difference Result 2501 states and 3773 transitions. [2022-07-13 11:35:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:35:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-13 11:35:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:45,951 INFO L225 Difference]: With dead ends: 2501 [2022-07-13 11:35:45,951 INFO L226 Difference]: Without dead ends: 1506 [2022-07-13 11:35:45,952 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 11:35:45,953 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 128 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:45,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 467 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:35:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-13 11:35:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-13 11:35:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.5056478405315614) internal successors, (2266), 1505 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states 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 11:35:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2266 transitions. [2022-07-13 11:35:45,999 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2266 transitions. Word has length 112 [2022-07-13 11:35:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:46,000 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2266 transitions. [2022-07-13 11:35:46,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2266 transitions. [2022-07-13 11:35:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-13 11:35:46,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:46,003 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:46,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 11:35:46,004 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash 676233651, now seen corresponding path program 1 times [2022-07-13 11:35:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061597380] [2022-07-13 11:35:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:46,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 161 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-13 11:35:46,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061597380] [2022-07-13 11:35:46,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061597380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:35:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910124554] [2022-07-13 11:35:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:46,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:35:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:35:46,259 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 11:35:46,260 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 11:35:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:47,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:35:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:35:47,477 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-13 11:35:47,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-13 11:35:47,486 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 123 treesize of output 63 [2022-07-13 11:35:47,494 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 11:35:47,506 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 11:35:47,634 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 11:35:47,669 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-13 11:35:47,669 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 45 treesize of output 21 [2022-07-13 11:35:47,677 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 11:35:47,712 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:35:47,713 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 11:35:47,730 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 11:35:47,745 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:35:47,746 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 11:35:47,788 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 11:35:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 154 proven. 55 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-07-13 11:35:47,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:35:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-13 11:35:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910124554] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:35:47,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:35:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-13 11:35:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851953457] [2022-07-13 11:35:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:35:47,840 INFO L87 Difference]: Start difference. First operand 1506 states and 2266 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:49,850 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 11:35:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:50,215 INFO L93 Difference]: Finished difference Result 3506 states and 5223 transitions. [2022-07-13 11:35:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-07-13 11:35:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:50,224 INFO L225 Difference]: With dead ends: 3506 [2022-07-13 11:35:50,224 INFO L226 Difference]: Without dead ends: 2010 [2022-07-13 11:35:50,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:35:50,227 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 98 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:50,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 280 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:35:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-07-13 11:35:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1638. [2022-07-13 11:35:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 1.4984728161270617) internal successors, (2453), 1637 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states 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 11:35:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2453 transitions. [2022-07-13 11:35:50,273 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2453 transitions. Word has length 149 [2022-07-13 11:35:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:50,274 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2453 transitions. [2022-07-13 11:35:50,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2453 transitions. [2022-07-13 11:35:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-13 11:35:50,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:50,278 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:50,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 11:35:50,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:35:50,500 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash -295976917, now seen corresponding path program 1 times [2022-07-13 11:35:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:50,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925061150] [2022-07-13 11:35:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-07-13 11:35:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:50,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925061150] [2022-07-13 11:35:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925061150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:50,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:50,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297643329] [2022-07-13 11:35:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:50,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:50,736 INFO L87 Difference]: Start difference. First operand 1638 states and 2453 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:52,746 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 11:35:54,767 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 11:35:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:55,005 INFO L93 Difference]: Finished difference Result 3120 states and 4656 transitions. [2022-07-13 11:35:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-07-13 11:35:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:55,023 INFO L225 Difference]: With dead ends: 3120 [2022-07-13 11:35:55,028 INFO L226 Difference]: Without dead ends: 1776 [2022-07-13 11:35:55,030 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 11:35:55,031 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 29 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:55,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 464 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-07-13 11:35:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1710. [2022-07-13 11:35:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.4961966062024576) internal successors, (2557), 1709 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states 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 11:35:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2557 transitions. [2022-07-13 11:35:55,071 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2557 transitions. Word has length 165 [2022-07-13 11:35:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:55,072 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 2557 transitions. [2022-07-13 11:35:55,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2557 transitions. [2022-07-13 11:35:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 11:35:55,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:55,077 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:35:55,077 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1679882959, now seen corresponding path program 1 times [2022-07-13 11:35:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:55,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199798391] [2022-07-13 11:35:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:55,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 204 proven. 20 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-13 11:35:55,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199798391] [2022-07-13 11:35:55,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199798391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:35:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783626142] [2022-07-13 11:35:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:55,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:35:55,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:35:55,332 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 11:35:55,361 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 11:35:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:56,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:35:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:35:56,535 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-13 11:35:56,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-13 11:35:56,542 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 123 treesize of output 63 [2022-07-13 11:35:56,550 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 11:35:56,558 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 11:35:56,691 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-13 11:35:56,694 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 11:35:56,725 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:35:56,725 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 11:35:56,741 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:35:56,741 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 11:35:56,772 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 11:35:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 229 proven. 40 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 11:35:56,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:35:56,841 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 10 treesize of output 4 [2022-07-13 11:35:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 235 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-13 11:35:56,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783626142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:35:56,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:35:56,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 14 [2022-07-13 11:35:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174584869] [2022-07-13 11:35:56,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:35:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:35:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:35:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:35:56,887 INFO L87 Difference]: Start difference. First operand 1710 states and 2557 transitions. Second operand has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:58,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:00,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:02,936 WARN L534 Checker$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 11:36:04,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:06,971 WARN L534 Checker$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 11:36:08,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:11,008 WARN L534 Checker$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 11:36:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:12,970 INFO L93 Difference]: Finished difference Result 4575 states and 6690 transitions. [2022-07-13 11:36:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 11:36:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-07-13 11:36:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:12,977 INFO L225 Difference]: With dead ends: 4575 [2022-07-13 11:36:12,977 INFO L226 Difference]: Without dead ends: 2875 [2022-07-13 11:36:12,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 11:36:12,980 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 702 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 231 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:12,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 1979 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1968 Invalid, 7 Unknown, 0 Unchecked, 15.8s Time] [2022-07-13 11:36:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-07-13 11:36:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1574. [2022-07-13 11:36:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 1.45645263827082) internal successors, (2291), 1573 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states 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 11:36:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2291 transitions. [2022-07-13 11:36:13,039 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2291 transitions. Word has length 179 [2022-07-13 11:36:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:13,040 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2291 transitions. [2022-07-13 11:36:13,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:36:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2291 transitions. [2022-07-13 11:36:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-13 11:36:13,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:13,044 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:13,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:36:13,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-13 11:36:13,272 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash -114643748, now seen corresponding path program 1 times [2022-07-13 11:36:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:13,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370821611] [2022-07-13 11:36:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:13,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-13 11:36:13,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:13,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370821611] [2022-07-13 11:36:13,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370821611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:13,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:13,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:13,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362023209] [2022-07-13 11:36:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:13,486 INFO L87 Difference]: Start difference. First operand 1574 states and 2291 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 11:36:15,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:17,516 WARN L534 Checker$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 11:36:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:17,816 INFO L93 Difference]: Finished difference Result 3035 states and 4405 transitions. [2022-07-13 11:36:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-07-13 11:36:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:17,821 INFO L225 Difference]: With dead ends: 3035 [2022-07-13 11:36:17,821 INFO L226 Difference]: Without dead ends: 1769 [2022-07-13 11:36:17,823 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 11:36:17,823 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 76 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:17,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 509 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:36:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-07-13 11:36:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1574. [2022-07-13 11:36:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 1.4539097266369994) internal successors, (2287), 1573 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states 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 11:36:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2287 transitions. [2022-07-13 11:36:17,861 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2287 transitions. Word has length 186 [2022-07-13 11:36:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:17,861 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2287 transitions. [2022-07-13 11:36:17,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 11:36:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2287 transitions. [2022-07-13 11:36:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-13 11:36:17,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:17,865 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:17,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:36:17,865 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1707611224, now seen corresponding path program 1 times [2022-07-13 11:36:17,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:17,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333091533] [2022-07-13 11:36:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:17,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 422 proven. 6 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-13 11:36:18,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333091533] [2022-07-13 11:36:18,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333091533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:36:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569282143] [2022-07-13 11:36:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:18,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:36:18,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:36:18,112 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 11:36:18,141 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 11:36:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:19,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:36:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:36:19,267 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-13 11:36:19,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-13 11:36:19,272 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 123 treesize of output 63 [2022-07-13 11:36:19,277 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 11:36:19,283 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 11:36:19,432 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-13 11:36:19,483 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:36:19,484 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 11:36:19,496 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 11:36:19,510 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:36:19,511 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 11:36:19,541 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 11:36:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 415 proven. 56 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-13 11:36:19,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:36:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 417 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-13 11:36:19,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569282143] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:36:19,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:36:19,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2022-07-13 11:36:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481795441] [2022-07-13 11:36:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:36:19,583 INFO L87 Difference]: Start difference. First operand 1574 states and 2287 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:36:21,594 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 11:36:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:21,898 INFO L93 Difference]: Finished difference Result 3175 states and 4588 transitions. [2022-07-13 11:36:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:21,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-07-13 11:36:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:21,903 INFO L225 Difference]: With dead ends: 3175 [2022-07-13 11:36:21,903 INFO L226 Difference]: Without dead ends: 1909 [2022-07-13 11:36:21,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:36:21,905 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:21,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 464 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:36:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-07-13 11:36:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1576. [2022-07-13 11:36:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.4444444444444444) internal successors, (2275), 1575 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states 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 11:36:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2275 transitions. [2022-07-13 11:36:21,942 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2275 transitions. Word has length 205 [2022-07-13 11:36:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:21,942 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2275 transitions. [2022-07-13 11:36:21,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:36:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2275 transitions. [2022-07-13 11:36:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-13 11:36:21,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:21,946 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:21,984 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 11:36:22,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:36:22,160 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1716286178, now seen corresponding path program 1 times [2022-07-13 11:36:22,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:22,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96752972] [2022-07-13 11:36:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-13 11:36:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96752972] [2022-07-13 11:36:22,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96752972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:22,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:22,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502728893] [2022-07-13 11:36:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:22,382 INFO L87 Difference]: Start difference. First operand 1576 states and 2275 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 11:36:24,393 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 11:36:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:24,669 INFO L93 Difference]: Finished difference Result 3383 states and 4832 transitions. [2022-07-13 11:36:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:24,670 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 222 [2022-07-13 11:36:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:24,672 INFO L225 Difference]: With dead ends: 3383 [2022-07-13 11:36:24,672 INFO L226 Difference]: Without dead ends: 1817 [2022-07-13 11:36:24,673 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 11:36:24,674 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 85 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:24,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 280 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:36:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-07-13 11:36:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1576. [2022-07-13 11:36:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.4412698412698413) internal successors, (2270), 1575 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states 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 11:36:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2270 transitions. [2022-07-13 11:36:24,713 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2270 transitions. Word has length 222 [2022-07-13 11:36:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:24,713 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2270 transitions. [2022-07-13 11:36:24,714 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 11:36:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2270 transitions. [2022-07-13 11:36:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-13 11:36:24,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:24,717 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:24,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 11:36:24,718 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:24,718 INFO L85 PathProgramCache]: Analyzing trace with hash -773653108, now seen corresponding path program 1 times [2022-07-13 11:36:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064877581] [2022-07-13 11:36:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-13 11:36:24,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064877581] [2022-07-13 11:36:24,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064877581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:24,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:24,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:24,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357271395] [2022-07-13 11:36:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:24,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:24,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:24,962 INFO L87 Difference]: Start difference. First operand 1576 states and 2270 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 11:36:26,971 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 11:36:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:27,257 INFO L93 Difference]: Finished difference Result 3368 states and 4802 transitions. [2022-07-13 11:36:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:27,258 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 224 [2022-07-13 11:36:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:27,260 INFO L225 Difference]: With dead ends: 3368 [2022-07-13 11:36:27,261 INFO L226 Difference]: Without dead ends: 1797 [2022-07-13 11:36:27,262 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 11:36:27,262 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 79 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:27,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 278 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:36:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-07-13 11:36:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1586. [2022-07-13 11:36:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 1.4416403785488958) internal successors, (2285), 1585 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 11:36:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2285 transitions. [2022-07-13 11:36:27,303 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2285 transitions. Word has length 224 [2022-07-13 11:36:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:27,304 INFO L495 AbstractCegarLoop]: Abstraction has 1586 states and 2285 transitions. [2022-07-13 11:36:27,304 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 11:36:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2285 transitions. [2022-07-13 11:36:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-13 11:36:27,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:27,307 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 11:36:27,308 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1248972930, now seen corresponding path program 1 times [2022-07-13 11:36:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:27,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90232460] [2022-07-13 11:36:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 11:36:27,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:27,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90232460] [2022-07-13 11:36:27,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90232460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:27,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:27,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:27,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484496230] [2022-07-13 11:36:27,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:27,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:27,533 INFO L87 Difference]: Start difference. First operand 1586 states and 2285 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 11:36:29,542 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 11:36:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:29,819 INFO L93 Difference]: Finished difference Result 3583 states and 5112 transitions. [2022-07-13 11:36:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:29,820 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 252 [2022-07-13 11:36:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:29,822 INFO L225 Difference]: With dead ends: 3583 [2022-07-13 11:36:29,822 INFO L226 Difference]: Without dead ends: 2007 [2022-07-13 11:36:29,824 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 11:36:29,824 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 86 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:29,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 280 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:36:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-07-13 11:36:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1751. [2022-07-13 11:36:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 1.4342857142857144) internal successors, (2510), 1750 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states 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 11:36:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2510 transitions. [2022-07-13 11:36:29,867 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2510 transitions. Word has length 252 [2022-07-13 11:36:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 1751 states and 2510 transitions. [2022-07-13 11:36:29,867 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 11:36:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2510 transitions. [2022-07-13 11:36:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-13 11:36:29,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:29,871 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 11:36:29,872 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2101549089, now seen corresponding path program 1 times [2022-07-13 11:36:29,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:29,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059834587] [2022-07-13 11:36:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 11:36:30,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059834587] [2022-07-13 11:36:30,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059834587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:30,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:30,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:30,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224416062] [2022-07-13 11:36:30,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:30,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:30,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:30,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:30,114 INFO L87 Difference]: Start difference. First operand 1751 states and 2510 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 11:36:32,125 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 11:36:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:32,402 INFO L93 Difference]: Finished difference Result 3908 states and 5552 transitions. [2022-07-13 11:36:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:32,402 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 252 [2022-07-13 11:36:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:32,405 INFO L225 Difference]: With dead ends: 3908 [2022-07-13 11:36:32,405 INFO L226 Difference]: Without dead ends: 2167 [2022-07-13 11:36:32,407 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 11:36:32,407 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 84 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:32,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 282 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:36:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-07-13 11:36:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1921. [2022-07-13 11:36:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4296875) internal successors, (2745), 1920 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states 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 11:36:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2745 transitions. [2022-07-13 11:36:32,448 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2745 transitions. Word has length 252 [2022-07-13 11:36:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:32,448 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2745 transitions. [2022-07-13 11:36:32,449 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 11:36:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2745 transitions. [2022-07-13 11:36:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-13 11:36:32,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:32,452 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-13 11:36:32,453 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1350270675, now seen corresponding path program 1 times [2022-07-13 11:36:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:32,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066511785] [2022-07-13 11:36:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 11:36:32,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:32,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066511785] [2022-07-13 11:36:32,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066511785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:32,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:32,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:32,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219782340] [2022-07-13 11:36:32,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:32,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:32,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:32,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:32,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:32,700 INFO L87 Difference]: Start difference. First operand 1921 states and 2745 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 11:36:34,710 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 11:36:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:35,008 INFO L93 Difference]: Finished difference Result 4043 states and 5727 transitions. [2022-07-13 11:36:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:35,009 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 253 [2022-07-13 11:36:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:35,012 INFO L225 Difference]: With dead ends: 4043 [2022-07-13 11:36:35,012 INFO L226 Difference]: Without dead ends: 2132 [2022-07-13 11:36:35,014 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 11:36:35,015 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 85 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:35,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 280 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:36:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-07-13 11:36:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1921. [2022-07-13 11:36:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4192708333333333) internal successors, (2725), 1920 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states 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 11:36:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2725 transitions. [2022-07-13 11:36:35,065 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2725 transitions. Word has length 253 [2022-07-13 11:36:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:35,066 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2725 transitions. [2022-07-13 11:36:35,066 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 11:36:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2725 transitions. [2022-07-13 11:36:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-13 11:36:35,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:35,070 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:36:35,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-13 11:36:35,070 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash -952042518, now seen corresponding path program 1 times [2022-07-13 11:36:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226918126] [2022-07-13 11:36:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:35,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 514 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 11:36:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226918126] [2022-07-13 11:36:35,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226918126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:35,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:35,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781779998] [2022-07-13 11:36:35,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:35,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:35,334 INFO L87 Difference]: Start difference. First operand 1921 states and 2725 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 11:36:37,343 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 11:36:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:37,715 INFO L93 Difference]: Finished difference Result 4043 states and 5687 transitions. [2022-07-13 11:36:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:37,724 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 253 [2022-07-13 11:36:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:37,743 INFO L225 Difference]: With dead ends: 4043 [2022-07-13 11:36:37,744 INFO L226 Difference]: Without dead ends: 2132 [2022-07-13 11:36:37,746 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 11:36:37,746 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 82 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:37,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 280 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:36:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-07-13 11:36:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1921. [2022-07-13 11:36:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4114583333333333) internal successors, (2710), 1920 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states 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 11:36:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2710 transitions. [2022-07-13 11:36:37,849 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2710 transitions. Word has length 253 [2022-07-13 11:36:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:37,850 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2710 transitions. [2022-07-13 11:36:37,850 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 11:36:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2710 transitions. [2022-07-13 11:36:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-13 11:36:37,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:37,854 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:36:37,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-13 11:36:37,855 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1192083348, now seen corresponding path program 1 times [2022-07-13 11:36:37,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:37,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544677552] [2022-07-13 11:36:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:37,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 11:36:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:38,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544677552] [2022-07-13 11:36:38,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544677552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:38,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:38,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308792587] [2022-07-13 11:36:38,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:38,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:38,141 INFO L87 Difference]: Start difference. First operand 1921 states and 2710 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 11:36:40,151 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 11:36:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:40,438 INFO L93 Difference]: Finished difference Result 4043 states and 5657 transitions. [2022-07-13 11:36:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:40,439 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 260 [2022-07-13 11:36:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:40,442 INFO L225 Difference]: With dead ends: 4043 [2022-07-13 11:36:40,442 INFO L226 Difference]: Without dead ends: 2132 [2022-07-13 11:36:40,444 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 11:36:40,445 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 76 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:40,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 282 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:36:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-07-13 11:36:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1921. [2022-07-13 11:36:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4088541666666667) internal successors, (2705), 1920 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states 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 11:36:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2705 transitions. [2022-07-13 11:36:40,498 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2705 transitions. Word has length 260 [2022-07-13 11:36:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:40,499 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2705 transitions. [2022-07-13 11:36:40,499 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 11:36:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2705 transitions. [2022-07-13 11:36:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-13 11:36:40,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:40,503 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:36:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-13 11:36:40,503 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1761922153, now seen corresponding path program 1 times [2022-07-13 11:36:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:40,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457798767] [2022-07-13 11:36:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-07-13 11:36:40,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457798767] [2022-07-13 11:36:40,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457798767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:40,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:40,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:36:40,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547556973] [2022-07-13 11:36:40,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:40,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:36:40,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:36:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:36:40,764 INFO L87 Difference]: Start difference. First operand 1921 states and 2705 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 11:36:42,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:44,790 WARN L534 Checker$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 11:36:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:45,026 INFO L93 Difference]: Finished difference Result 3883 states and 5457 transitions. [2022-07-13 11:36:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:36:45,027 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 261 [2022-07-13 11:36:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:45,030 INFO L225 Difference]: With dead ends: 3883 [2022-07-13 11:36:45,030 INFO L226 Difference]: Without dead ends: 1972 [2022-07-13 11:36:45,032 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 11:36:45,033 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 27 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:45,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 458 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:36:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2022-07-13 11:36:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1921. [2022-07-13 11:36:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4067708333333333) internal successors, (2701), 1920 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states 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 11:36:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2701 transitions. [2022-07-13 11:36:45,086 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2701 transitions. Word has length 261 [2022-07-13 11:36:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:45,087 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2701 transitions. [2022-07-13 11:36:45,087 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 11:36:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2701 transitions. [2022-07-13 11:36:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-07-13 11:36:45,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:45,091 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 7, 7, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-13 11:36:45,091 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash -167396823, now seen corresponding path program 1 times [2022-07-13 11:36:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745855621] [2022-07-13 11:36:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 587 proven. 1 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-07-13 11:36:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745855621] [2022-07-13 11:36:45,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745855621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:36:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540726318] [2022-07-13 11:36:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:36:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:36:45,387 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 11:36:45,394 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 11:36:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:36:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:36:46,832 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-13 11:36:46,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-13 11:36:46,838 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 123 treesize of output 63 [2022-07-13 11:36:46,845 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 11:36:46,853 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 11:36:46,936 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-13 11:36:46,940 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 11:36:46,991 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:36:46,991 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 11:36:47,001 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:36:47,001 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 11:36:47,028 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 11:36:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 549 proven. 40 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-07-13 11:36:47,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:36:47,082 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 10 treesize of output 4 [2022-07-13 11:36:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 555 proven. 24 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-13 11:36:47,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540726318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:36:47,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:36:47,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 13 [2022-07-13 11:36:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670723559] [2022-07-13 11:36:47,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:36:47,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:36:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:36:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:36:47,143 INFO L87 Difference]: Start difference. First operand 1921 states and 2701 transitions. Second operand has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 11:36:49,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:51,173 WARN L534 Checker$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 11:36:53,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:55,208 WARN L534 Checker$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 11:36:57,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:59,244 WARN L534 Checker$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 11:37:01,267 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 11:37:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:02,845 INFO L93 Difference]: Finished difference Result 5729 states and 7979 transitions. [2022-07-13 11:37:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 11:37:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2022-07-13 11:37:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:02,850 INFO L225 Difference]: With dead ends: 5729 [2022-07-13 11:37:02,850 INFO L226 Difference]: Without dead ends: 3818 [2022-07-13 11:37:02,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-07-13 11:37:02,852 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 736 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 232 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:02,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1613 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1472 Invalid, 7 Unknown, 0 Unchecked, 15.4s Time] [2022-07-13 11:37:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2022-07-13 11:37:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 3011. [2022-07-13 11:37:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 1.36843853820598) internal successors, (4119), 3010 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states 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 11:37:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4119 transitions. [2022-07-13 11:37:02,944 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4119 transitions. Word has length 278 [2022-07-13 11:37:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:02,945 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 4119 transitions. [2022-07-13 11:37:02,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 11:37:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4119 transitions. [2022-07-13 11:37:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-13 11:37:02,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:02,950 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 8, 7, 6, 5, 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, 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 11:37:02,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:37:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:37:03,163 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash 602537677, now seen corresponding path program 1 times [2022-07-13 11:37:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:03,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646823106] [2022-07-13 11:37:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-07-13 11:37:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646823106] [2022-07-13 11:37:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646823106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:03,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:03,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:03,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430218416] [2022-07-13 11:37:03,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:03,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:03,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:03,372 INFO L87 Difference]: Start difference. First operand 3011 states and 4119 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:05,388 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 11:37:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:05,702 INFO L93 Difference]: Finished difference Result 6199 states and 8445 transitions. [2022-07-13 11:37:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-07-13 11:37:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:05,705 INFO L225 Difference]: With dead ends: 6199 [2022-07-13 11:37:05,705 INFO L226 Difference]: Without dead ends: 3198 [2022-07-13 11:37:05,708 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 11:37:05,708 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 96 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:05,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 280 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:37:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-07-13 11:37:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3011. [2022-07-13 11:37:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 1.3475083056478405) internal successors, (4056), 3010 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states 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 11:37:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4056 transitions. [2022-07-13 11:37:05,771 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4056 transitions. Word has length 280 [2022-07-13 11:37:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:05,771 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 4056 transitions. [2022-07-13 11:37:05,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:37:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4056 transitions. [2022-07-13 11:37:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-07-13 11:37:05,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:05,775 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:37:05,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-13 11:37:05,775 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1181933716, now seen corresponding path program 1 times [2022-07-13 11:37:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:05,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094624864] [2022-07-13 11:37:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 620 proven. 0 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-07-13 11:37:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094624864] [2022-07-13 11:37:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094624864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:05,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:05,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840988629] [2022-07-13 11:37:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:05,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:05,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:05,996 INFO L87 Difference]: Start difference. First operand 3011 states and 4056 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:37:08,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:10,028 WARN L534 Checker$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 11:37:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:10,243 INFO L93 Difference]: Finished difference Result 6309 states and 8474 transitions. [2022-07-13 11:37:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2022-07-13 11:37:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:10,247 INFO L225 Difference]: With dead ends: 6309 [2022-07-13 11:37:10,247 INFO L226 Difference]: Without dead ends: 3308 [2022-07-13 11:37:10,249 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 11:37:10,250 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:10,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 450 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:37:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-07-13 11:37:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3245. [2022-07-13 11:37:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3244 states have (on average 1.339087546239211) internal successors, (4344), 3244 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states 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 11:37:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4344 transitions. [2022-07-13 11:37:10,338 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4344 transitions. Word has length 283 [2022-07-13 11:37:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:10,338 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 4344 transitions. [2022-07-13 11:37:10,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:37:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4344 transitions. [2022-07-13 11:37:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-07-13 11:37:10,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:10,343 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 9, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:37:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-13 11:37:10,343 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1021285984, now seen corresponding path program 1 times [2022-07-13 11:37:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6935823] [2022-07-13 11:37:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-13 11:37:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:10,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6935823] [2022-07-13 11:37:10,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6935823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:10,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:10,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:37:10,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535047451] [2022-07-13 11:37:10,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:10,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:37:10,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:10,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:37:10,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:37:10,530 INFO L87 Difference]: Start difference. First operand 3245 states and 4344 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 11:37:12,540 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 11:37:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:12,835 INFO L93 Difference]: Finished difference Result 6639 states and 8864 transitions. [2022-07-13 11:37:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:37:12,835 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 298 [2022-07-13 11:37:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:12,839 INFO L225 Difference]: With dead ends: 6639 [2022-07-13 11:37:12,839 INFO L226 Difference]: Without dead ends: 3404 [2022-07-13 11:37:12,841 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 11:37:12,842 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 96 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:12,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 284 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:37:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2022-07-13 11:37:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2051. [2022-07-13 11:37:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.3385365853658537) internal successors, (2744), 2050 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states 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 11:37:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 2744 transitions. [2022-07-13 11:37:12,921 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 2744 transitions. Word has length 298 [2022-07-13 11:37:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:12,921 INFO L495 AbstractCegarLoop]: Abstraction has 2051 states and 2744 transitions. [2022-07-13 11:37:12,921 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 11:37:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 2744 transitions. [2022-07-13 11:37:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-07-13 11:37:12,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:12,924 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:37:12,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-13 11:37:12,925 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1651619095, now seen corresponding path program 1 times [2022-07-13 11:37:12,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:12,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994560386] [2022-07-13 11:37:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 546 proven. 238 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-07-13 11:37:15,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994560386] [2022-07-13 11:37:15,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994560386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:37:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93323457] [2022-07-13 11:37:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:15,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:37:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:37:15,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:37:15,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:37:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 189 conjunts are in the unsatisfiable core [2022-07-13 11:37:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:37:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver