./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:55:12,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:55:12,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:55:12,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:55:12,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:55:12,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:55:12,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:55:12,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:55:12,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:55:12,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:55:12,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:55:12,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:55:12,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:55:12,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:55:12,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:55:12,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:55:12,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:55:12,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:55:12,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:55:12,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:55:12,861 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:55:12,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:55:12,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:55:12,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:55:12,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:55:12,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:55:12,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:55:12,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:55:12,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:55:12,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:55:12,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:55:12,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:55:12,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:55:12,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:55:12,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:55:12,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:55:12,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:55:12,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:55:12,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:55:12,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:55:12,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:55:12,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:55:12,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:55:12,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:55:12,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:55:12,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:55:12,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:55:12,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:55:12,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:55:12,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:55:12,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:55:12,896 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:55:12,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:55:12,898 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:55:12,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:55:12,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:55:12,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:55:12,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:55:12,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:55:12,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:55:12,899 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:55:12,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:55:12,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:55:12,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:55:12,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:55:12,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:55:12,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:55:12,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:55:12,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:55:12,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:55:12,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:55:12,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:55:12,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:55:12,902 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:55:12,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:55:12,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:55:12,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 [2022-07-11 23:55:13,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:55:13,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:55:13,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:55:13,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:55:13,150 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:55:13,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2022-07-11 23:55:13,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fd864a5/8a338331349a4dc99681a07cecb40ff6/FLAG9dfe04dca [2022-07-11 23:55:13,748 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:55:13,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2022-07-11 23:55:13,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fd864a5/8a338331349a4dc99681a07cecb40ff6/FLAG9dfe04dca [2022-07-11 23:55:14,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fd864a5/8a338331349a4dc99681a07cecb40ff6 [2022-07-11 23:55:14,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:55:14,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:55:14,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:55:14,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:55:14,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:55:14,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5431d5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14, skipping insertion in model container [2022-07-11 23:55:14,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:55:14,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:55:14,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2022-07-11 23:55:14,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:55:14,458 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:55:14,606 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2022-07-11 23:55:14,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:55:14,631 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:55:14,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14 WrapperNode [2022-07-11 23:55:14,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:55:14,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:55:14,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:55:14,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:55:14,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,731 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 804 [2022-07-11 23:55:14,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:55:14,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:55:14,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:55:14,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:55:14,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:55:14,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:55:14,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:55:14,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:55:14,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (1/1) ... [2022-07-11 23:55:14,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:55:14,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:14,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:55:14,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:55:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:55:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:55:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:55:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:55:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:55:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:55:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:55:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:55:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:55:15,024 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:55:15,025 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:55:15,055 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:55:17,382 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-11 23:55:17,382 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-11 23:55:17,382 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:55:17,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:55:17,389 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:55:17,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:55:17 BoogieIcfgContainer [2022-07-11 23:55:17,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:55:17,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:55:17,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:55:17,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:55:17,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:55:14" (1/3) ... [2022-07-11 23:55:17,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30586c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:55:17, skipping insertion in model container [2022-07-11 23:55:17,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:14" (2/3) ... [2022-07-11 23:55:17,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30586c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:55:17, skipping insertion in model container [2022-07-11 23:55:17,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:55:17" (3/3) ... [2022-07-11 23:55:17,398 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-1.c [2022-07-11 23:55:17,410 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:55:17,410 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:55:17,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:55:17,489 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@5528b89a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45554dd2 [2022-07-11 23:55:17,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:55:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:55:17,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:17,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:17,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777164, now seen corresponding path program 1 times [2022-07-11 23:55:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:17,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473724274] [2022-07-11 23:55:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:17,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:18,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473724274] [2022-07-11 23:55:18,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473724274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:18,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:18,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237355468] [2022-07-11 23:55:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:18,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:18,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:18,136 INFO L87 Difference]: Start difference. First operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:19,090 INFO L93 Difference]: Finished difference Result 439 states and 752 transitions. [2022-07-11 23:55:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:19,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-11 23:55:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:19,104 INFO L225 Difference]: With dead ends: 439 [2022-07-11 23:55:19,106 INFO L226 Difference]: Without dead ends: 268 [2022-07-11 23:55:19,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:19,112 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 168 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:19,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 477 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:55:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-11 23:55:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 183. [2022-07-11 23:55:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.620879120879121) internal successors, (295), 182 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 295 transitions. [2022-07-11 23:55:19,182 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 295 transitions. Word has length 45 [2022-07-11 23:55:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:19,183 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 295 transitions. [2022-07-11 23:55:19,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 295 transitions. [2022-07-11 23:55:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:55:19,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:19,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:19,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:55:19,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash -956498701, now seen corresponding path program 1 times [2022-07-11 23:55:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199041042] [2022-07-11 23:55:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:19,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:19,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:19,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199041042] [2022-07-11 23:55:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199041042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:19,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:19,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092174274] [2022-07-11 23:55:19,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:19,336 INFO L87 Difference]: Start difference. First operand 183 states and 295 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:19,865 INFO L93 Difference]: Finished difference Result 384 states and 617 transitions. [2022-07-11 23:55:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:19,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-11 23:55:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:19,877 INFO L225 Difference]: With dead ends: 384 [2022-07-11 23:55:19,877 INFO L226 Difference]: Without dead ends: 211 [2022-07-11 23:55:19,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:19,879 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 22 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:19,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 505 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-11 23:55:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 194. [2022-07-11 23:55:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.6269430051813472) internal successors, (314), 193 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 314 transitions. [2022-07-11 23:55:19,888 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 314 transitions. Word has length 46 [2022-07-11 23:55:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:19,889 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 314 transitions. [2022-07-11 23:55:19,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 314 transitions. [2022-07-11 23:55:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:55:19,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:19,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:19,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:55:19,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2145202459, now seen corresponding path program 1 times [2022-07-11 23:55:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:19,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919066697] [2022-07-11 23:55:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:20,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919066697] [2022-07-11 23:55:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919066697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:20,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:20,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:20,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391725105] [2022-07-11 23:55:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:20,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:20,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:20,018 INFO L87 Difference]: Start difference. First operand 194 states and 314 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:20,802 INFO L93 Difference]: Finished difference Result 530 states and 863 transitions. [2022-07-11 23:55:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:20,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-11 23:55:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:20,804 INFO L225 Difference]: With dead ends: 530 [2022-07-11 23:55:20,804 INFO L226 Difference]: Without dead ends: 357 [2022-07-11 23:55:20,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:20,806 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 157 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:20,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 678 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:55:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-11 23:55:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 226. [2022-07-11 23:55:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.6222222222222222) internal successors, (365), 225 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 365 transitions. [2022-07-11 23:55:20,827 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 365 transitions. Word has length 59 [2022-07-11 23:55:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:20,827 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 365 transitions. [2022-07-11 23:55:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 365 transitions. [2022-07-11 23:55:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:55:20,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:20,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:20,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:55:20,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash -218909964, now seen corresponding path program 1 times [2022-07-11 23:55:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:20,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384579262] [2022-07-11 23:55:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384579262] [2022-07-11 23:55:20,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384579262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:20,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:20,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163613455] [2022-07-11 23:55:20,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:20,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:20,986 INFO L87 Difference]: Start difference. First operand 226 states and 365 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:22,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:23,434 INFO L93 Difference]: Finished difference Result 538 states and 866 transitions. [2022-07-11 23:55:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:55:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:23,436 INFO L225 Difference]: With dead ends: 538 [2022-07-11 23:55:23,436 INFO L226 Difference]: Without dead ends: 333 [2022-07-11 23:55:23,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:23,438 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 162 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:23,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-11 23:55:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-11 23:55:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 226. [2022-07-11 23:55:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.6044444444444443) internal successors, (361), 225 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 361 transitions. [2022-07-11 23:55:23,446 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 361 transitions. Word has length 60 [2022-07-11 23:55:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:23,446 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 361 transitions. [2022-07-11 23:55:23,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 361 transitions. [2022-07-11 23:55:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:55:23,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:23,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:23,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:55:23,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:23,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1854445344, now seen corresponding path program 1 times [2022-07-11 23:55:23,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:23,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348768668] [2022-07-11 23:55:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:23,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:23,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348768668] [2022-07-11 23:55:23,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348768668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:23,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:23,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:23,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268632585] [2022-07-11 23:55:23,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:23,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:23,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:23,597 INFO L87 Difference]: Start difference. First operand 226 states and 361 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:24,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:24,953 INFO L93 Difference]: Finished difference Result 447 states and 711 transitions. [2022-07-11 23:55:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:55:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:24,956 INFO L225 Difference]: With dead ends: 447 [2022-07-11 23:55:24,957 INFO L226 Difference]: Without dead ends: 242 [2022-07-11 23:55:24,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:24,958 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 26 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:24,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 509 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:55:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-11 23:55:24,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 226. [2022-07-11 23:55:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.6) internal successors, (360), 225 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 360 transitions. [2022-07-11 23:55:24,972 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 360 transitions. Word has length 60 [2022-07-11 23:55:24,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:24,973 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 360 transitions. [2022-07-11 23:55:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 360 transitions. [2022-07-11 23:55:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:55:24,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:24,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:55:24,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1794705641, now seen corresponding path program 1 times [2022-07-11 23:55:24,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578267936] [2022-07-11 23:55:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:25,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578267936] [2022-07-11 23:55:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578267936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:25,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149491119] [2022-07-11 23:55:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:25,116 INFO L87 Difference]: Start difference. First operand 226 states and 360 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:26,275 INFO L93 Difference]: Finished difference Result 446 states and 709 transitions. [2022-07-11 23:55:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:26,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:55:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:26,278 INFO L225 Difference]: With dead ends: 446 [2022-07-11 23:55:26,278 INFO L226 Difference]: Without dead ends: 241 [2022-07-11 23:55:26,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:26,279 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 19 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:26,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 511 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:55:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-11 23:55:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 226. [2022-07-11 23:55:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5955555555555556) internal successors, (359), 225 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 359 transitions. [2022-07-11 23:55:26,285 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 359 transitions. Word has length 60 [2022-07-11 23:55:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:26,286 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 359 transitions. [2022-07-11 23:55:26,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 359 transitions. [2022-07-11 23:55:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:55:26,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:26,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:26,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:55:26,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash -175581143, now seen corresponding path program 1 times [2022-07-11 23:55:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:26,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664857888] [2022-07-11 23:55:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:26,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:26,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664857888] [2022-07-11 23:55:26,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664857888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:26,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:26,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:26,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268757775] [2022-07-11 23:55:26,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:26,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:26,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:26,379 INFO L87 Difference]: Start difference. First operand 226 states and 359 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:27,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:27,813 INFO L93 Difference]: Finished difference Result 538 states and 857 transitions. [2022-07-11 23:55:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:55:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:27,815 INFO L225 Difference]: With dead ends: 538 [2022-07-11 23:55:27,815 INFO L226 Difference]: Without dead ends: 333 [2022-07-11 23:55:27,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:27,816 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 155 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:27,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-11 23:55:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-11 23:55:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 227. [2022-07-11 23:55:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.584070796460177) internal successors, (358), 226 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 358 transitions. [2022-07-11 23:55:27,822 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 358 transitions. Word has length 60 [2022-07-11 23:55:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:27,822 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 358 transitions. [2022-07-11 23:55:27,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 358 transitions. [2022-07-11 23:55:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:55:27,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:27,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:27,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:55:27,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash 173549916, now seen corresponding path program 1 times [2022-07-11 23:55:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:27,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590835188] [2022-07-11 23:55:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:27,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590835188] [2022-07-11 23:55:27,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590835188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:27,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:27,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:27,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081940551] [2022-07-11 23:55:27,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:27,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:27,945 INFO L87 Difference]: Start difference. First operand 227 states and 358 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:29,104 INFO L93 Difference]: Finished difference Result 446 states and 705 transitions. [2022-07-11 23:55:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:29,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-11 23:55:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:29,107 INFO L225 Difference]: With dead ends: 446 [2022-07-11 23:55:29,107 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 23:55:29,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:29,108 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 22 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:29,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:55:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 23:55:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2022-07-11 23:55:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.579646017699115) internal successors, (357), 226 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 357 transitions. [2022-07-11 23:55:29,113 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 357 transitions. Word has length 61 [2022-07-11 23:55:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:29,119 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 357 transitions. [2022-07-11 23:55:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 357 transitions. [2022-07-11 23:55:29,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:55:29,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:29,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:55:29,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash -830168645, now seen corresponding path program 1 times [2022-07-11 23:55:29,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:29,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238418697] [2022-07-11 23:55:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:29,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238418697] [2022-07-11 23:55:29,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238418697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:29,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:29,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699112522] [2022-07-11 23:55:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:29,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:29,217 INFO L87 Difference]: Start difference. First operand 227 states and 357 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:29,961 INFO L93 Difference]: Finished difference Result 446 states and 704 transitions. [2022-07-11 23:55:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-11 23:55:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:29,962 INFO L225 Difference]: With dead ends: 446 [2022-07-11 23:55:29,962 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 23:55:29,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:29,964 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:29,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:55:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 23:55:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2022-07-11 23:55:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.575221238938053) internal successors, (356), 226 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 356 transitions. [2022-07-11 23:55:29,969 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 356 transitions. Word has length 62 [2022-07-11 23:55:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:29,969 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 356 transitions. [2022-07-11 23:55:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 356 transitions. [2022-07-11 23:55:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 23:55:29,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:29,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:55:29,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1327735145, now seen corresponding path program 1 times [2022-07-11 23:55:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:29,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030467148] [2022-07-11 23:55:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:30,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:30,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030467148] [2022-07-11 23:55:30,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030467148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:30,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:30,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493481506] [2022-07-11 23:55:30,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:30,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:30,099 INFO L87 Difference]: Start difference. First operand 227 states and 356 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:30,715 INFO L93 Difference]: Finished difference Result 436 states and 690 transitions. [2022-07-11 23:55:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-11 23:55:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:30,717 INFO L225 Difference]: With dead ends: 436 [2022-07-11 23:55:30,717 INFO L226 Difference]: Without dead ends: 230 [2022-07-11 23:55:30,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:30,718 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 11 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:30,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 529 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:55:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-11 23:55:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2022-07-11 23:55:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5707964601769913) internal successors, (355), 226 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 355 transitions. [2022-07-11 23:55:30,725 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 355 transitions. Word has length 63 [2022-07-11 23:55:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:30,725 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 355 transitions. [2022-07-11 23:55:30,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 355 transitions. [2022-07-11 23:55:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 23:55:30,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:30,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:55:30,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1179024943, now seen corresponding path program 1 times [2022-07-11 23:55:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172229950] [2022-07-11 23:55:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:30,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:30,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172229950] [2022-07-11 23:55:30,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172229950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:30,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:30,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:30,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828733502] [2022-07-11 23:55:30,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:30,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:30,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:30,813 INFO L87 Difference]: Start difference. First operand 227 states and 355 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:31,739 INFO L93 Difference]: Finished difference Result 473 states and 745 transitions. [2022-07-11 23:55:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-11 23:55:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:31,741 INFO L225 Difference]: With dead ends: 473 [2022-07-11 23:55:31,741 INFO L226 Difference]: Without dead ends: 267 [2022-07-11 23:55:31,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:31,742 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 31 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:31,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 533 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:55:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-11 23:55:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 249. [2022-07-11 23:55:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5725806451612903) internal successors, (390), 248 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 390 transitions. [2022-07-11 23:55:31,747 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 390 transitions. Word has length 63 [2022-07-11 23:55:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:31,747 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 390 transitions. [2022-07-11 23:55:31,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 390 transitions. [2022-07-11 23:55:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-11 23:55:31,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:31,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:31,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:55:31,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1124593380, now seen corresponding path program 1 times [2022-07-11 23:55:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:31,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604173448] [2022-07-11 23:55:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:31,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:31,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604173448] [2022-07-11 23:55:31,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604173448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:31,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:31,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871443299] [2022-07-11 23:55:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:31,874 INFO L87 Difference]: Start difference. First operand 249 states and 390 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:33,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:33,428 INFO L93 Difference]: Finished difference Result 583 states and 921 transitions. [2022-07-11 23:55:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-11 23:55:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:33,430 INFO L225 Difference]: With dead ends: 583 [2022-07-11 23:55:33,430 INFO L226 Difference]: Without dead ends: 355 [2022-07-11 23:55:33,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:33,431 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 160 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:33,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:55:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-11 23:55:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2022-07-11 23:55:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5564516129032258) internal successors, (386), 248 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 386 transitions. [2022-07-11 23:55:33,439 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 386 transitions. Word has length 77 [2022-07-11 23:55:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:33,439 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 386 transitions. [2022-07-11 23:55:33,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 386 transitions. [2022-07-11 23:55:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-11 23:55:33,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:33,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:33,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:55:33,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1770409691, now seen corresponding path program 1 times [2022-07-11 23:55:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709333674] [2022-07-11 23:55:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:33,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709333674] [2022-07-11 23:55:33,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709333674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:33,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:33,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9271737] [2022-07-11 23:55:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:33,569 INFO L87 Difference]: Start difference. First operand 249 states and 386 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:34,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:35,172 INFO L93 Difference]: Finished difference Result 494 states and 770 transitions. [2022-07-11 23:55:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-11 23:55:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:35,174 INFO L225 Difference]: With dead ends: 494 [2022-07-11 23:55:35,174 INFO L226 Difference]: Without dead ends: 266 [2022-07-11 23:55:35,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:35,175 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 33 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:35,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 535 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:55:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-11 23:55:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 249. [2022-07-11 23:55:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5524193548387097) internal successors, (385), 248 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 385 transitions. [2022-07-11 23:55:35,181 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 385 transitions. Word has length 77 [2022-07-11 23:55:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:35,181 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 385 transitions. [2022-07-11 23:55:35,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 385 transitions. [2022-07-11 23:55:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-11 23:55:35,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:35,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:35,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:55:35,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1324124320, now seen corresponding path program 1 times [2022-07-11 23:55:35,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:35,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902548920] [2022-07-11 23:55:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:35,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:35,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902548920] [2022-07-11 23:55:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902548920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:35,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:35,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:35,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453242772] [2022-07-11 23:55:35,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:35,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:35,280 INFO L87 Difference]: Start difference. First operand 249 states and 385 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) [2022-07-11 23:55:36,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:37,194 INFO L93 Difference]: Finished difference Result 583 states and 911 transitions. [2022-07-11 23:55:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:37,195 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 78 [2022-07-11 23:55:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:37,196 INFO L225 Difference]: With dead ends: 583 [2022-07-11 23:55:37,196 INFO L226 Difference]: Without dead ends: 355 [2022-07-11 23:55:37,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:37,197 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 158 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:37,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:55:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-11 23:55:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2022-07-11 23:55:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5362903225806452) internal successors, (381), 248 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 381 transitions. [2022-07-11 23:55:37,205 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 381 transitions. Word has length 78 [2022-07-11 23:55:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:37,205 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 381 transitions. [2022-07-11 23:55:37,205 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) [2022-07-11 23:55:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 381 transitions. [2022-07-11 23:55:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-11 23:55:37,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:37,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:37,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:55:37,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash 477899511, now seen corresponding path program 1 times [2022-07-11 23:55:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:37,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49980130] [2022-07-11 23:55:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:37,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:37,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:37,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49980130] [2022-07-11 23:55:37,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49980130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:37,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:37,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974886134] [2022-07-11 23:55:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:37,315 INFO L87 Difference]: Start difference. First operand 249 states and 381 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:37,836 INFO L93 Difference]: Finished difference Result 583 states and 903 transitions. [2022-07-11 23:55:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:37,837 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 79 [2022-07-11 23:55:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:37,838 INFO L225 Difference]: With dead ends: 583 [2022-07-11 23:55:37,838 INFO L226 Difference]: Without dead ends: 355 [2022-07-11 23:55:37,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:37,839 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 156 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:37,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-11 23:55:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2022-07-11 23:55:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5201612903225807) internal successors, (377), 248 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 377 transitions. [2022-07-11 23:55:37,846 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 377 transitions. Word has length 79 [2022-07-11 23:55:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:37,846 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 377 transitions. [2022-07-11 23:55:37,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 377 transitions. [2022-07-11 23:55:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-11 23:55:37,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:37,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:37,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:55:37,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash 567672027, now seen corresponding path program 1 times [2022-07-11 23:55:37,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:37,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671286328] [2022-07-11 23:55:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:37,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:37,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671286328] [2022-07-11 23:55:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671286328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:37,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:37,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:37,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419860538] [2022-07-11 23:55:37,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:37,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:37,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:37,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:37,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:37,941 INFO L87 Difference]: Start difference. First operand 249 states and 377 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:38,714 INFO L93 Difference]: Finished difference Result 573 states and 882 transitions. [2022-07-11 23:55:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:38,714 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 80 [2022-07-11 23:55:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:38,716 INFO L225 Difference]: With dead ends: 573 [2022-07-11 23:55:38,716 INFO L226 Difference]: Without dead ends: 345 [2022-07-11 23:55:38,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:38,717 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 147 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:38,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 390 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:55:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-11 23:55:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 249. [2022-07-11 23:55:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5040322580645162) internal successors, (373), 248 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 373 transitions. [2022-07-11 23:55:38,727 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 373 transitions. Word has length 80 [2022-07-11 23:55:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:38,728 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 373 transitions. [2022-07-11 23:55:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 373 transitions. [2022-07-11 23:55:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-11 23:55:38,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:38,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:38,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:55:38,730 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1809042218, now seen corresponding path program 1 times [2022-07-11 23:55:38,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:38,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666986412] [2022-07-11 23:55:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:38,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:55:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666986412] [2022-07-11 23:55:38,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666986412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:38,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:38,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011595797] [2022-07-11 23:55:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:38,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:38,859 INFO L87 Difference]: Start difference. First operand 249 states and 373 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:40,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:41,057 INFO L93 Difference]: Finished difference Result 573 states and 874 transitions. [2022-07-11 23:55:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:41,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-11 23:55:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:41,059 INFO L225 Difference]: With dead ends: 573 [2022-07-11 23:55:41,059 INFO L226 Difference]: Without dead ends: 345 [2022-07-11 23:55:41,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:41,060 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 121 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:41,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 412 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:55:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-11 23:55:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 272. [2022-07-11 23:55:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.5424354243542435) internal successors, (418), 271 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 418 transitions. [2022-07-11 23:55:41,092 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 418 transitions. Word has length 85 [2022-07-11 23:55:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:41,093 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 418 transitions. [2022-07-11 23:55:41,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 418 transitions. [2022-07-11 23:55:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:55:41,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:41,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:41,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:55:41,095 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash -444443904, now seen corresponding path program 1 times [2022-07-11 23:55:41,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:41,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458472369] [2022-07-11 23:55:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:41,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:55:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458472369] [2022-07-11 23:55:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458472369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:41,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:41,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770479627] [2022-07-11 23:55:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:41,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:41,223 INFO L87 Difference]: Start difference. First operand 272 states and 418 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:43,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:43,414 INFO L93 Difference]: Finished difference Result 611 states and 946 transitions. [2022-07-11 23:55:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-11 23:55:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:43,417 INFO L225 Difference]: With dead ends: 611 [2022-07-11 23:55:43,417 INFO L226 Difference]: Without dead ends: 360 [2022-07-11 23:55:43,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:43,418 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 86 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:43,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 511 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:55:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-11 23:55:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 306. [2022-07-11 23:55:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.544262295081967) internal successors, (471), 305 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 471 transitions. [2022-07-11 23:55:43,426 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 471 transitions. Word has length 113 [2022-07-11 23:55:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:43,427 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 471 transitions. [2022-07-11 23:55:43,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 471 transitions. [2022-07-11 23:55:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:55:43,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:43,428 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:43,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:55:43,429 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1464013886, now seen corresponding path program 1 times [2022-07-11 23:55:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:43,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415213363] [2022-07-11 23:55:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:43,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:55:43,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415213363] [2022-07-11 23:55:43,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415213363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:43,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:43,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:43,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990605224] [2022-07-11 23:55:43,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:43,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:43,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:43,614 INFO L87 Difference]: Start difference. First operand 306 states and 471 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:44,105 INFO L93 Difference]: Finished difference Result 740 states and 1152 transitions. [2022-07-11 23:55:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-11 23:55:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:44,108 INFO L225 Difference]: With dead ends: 740 [2022-07-11 23:55:44,108 INFO L226 Difference]: Without dead ends: 455 [2022-07-11 23:55:44,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:44,109 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:44,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 400 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-11 23:55:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 336. [2022-07-11 23:55:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5522388059701493) internal successors, (520), 335 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 520 transitions. [2022-07-11 23:55:44,118 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 520 transitions. Word has length 113 [2022-07-11 23:55:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:44,118 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 520 transitions. [2022-07-11 23:55:44,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 520 transitions. [2022-07-11 23:55:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-11 23:55:44,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:44,120 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:55:44,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash 283071561, now seen corresponding path program 1 times [2022-07-11 23:55:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:44,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432399657] [2022-07-11 23:55:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:44,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:55:44,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432399657] [2022-07-11 23:55:44,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432399657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:44,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:44,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:44,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173489351] [2022-07-11 23:55:44,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:44,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:44,249 INFO L87 Difference]: Start difference. First operand 336 states and 520 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:46,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:46,548 INFO L93 Difference]: Finished difference Result 764 states and 1187 transitions. [2022-07-11 23:55:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-11 23:55:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:46,550 INFO L225 Difference]: With dead ends: 764 [2022-07-11 23:55:46,550 INFO L226 Difference]: Without dead ends: 449 [2022-07-11 23:55:46,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:46,551 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 123 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:46,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 388 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:55:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-11 23:55:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 373. [2022-07-11 23:55:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.5564516129032258) internal successors, (579), 372 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 579 transitions. [2022-07-11 23:55:46,561 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 579 transitions. Word has length 119 [2022-07-11 23:55:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:46,561 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 579 transitions. [2022-07-11 23:55:46,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 579 transitions. [2022-07-11 23:55:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-11 23:55:46,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:46,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:46,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:55:46,563 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1331910876, now seen corresponding path program 1 times [2022-07-11 23:55:46,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276216401] [2022-07-11 23:55:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:55:46,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:46,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276216401] [2022-07-11 23:55:46,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276216401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:46,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:46,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:46,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142328401] [2022-07-11 23:55:46,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:46,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:46,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:46,666 INFO L87 Difference]: Start difference. First operand 373 states and 579 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:47,527 INFO L93 Difference]: Finished difference Result 810 states and 1262 transitions. [2022-07-11 23:55:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:47,527 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 120 [2022-07-11 23:55:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:47,529 INFO L225 Difference]: With dead ends: 810 [2022-07-11 23:55:47,529 INFO L226 Difference]: Without dead ends: 458 [2022-07-11 23:55:47,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:47,531 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 75 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:47,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 513 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:55:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-11 23:55:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 413. [2022-07-11 23:55:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.558252427184466) internal successors, (642), 412 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 642 transitions. [2022-07-11 23:55:47,541 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 642 transitions. Word has length 120 [2022-07-11 23:55:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:47,542 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 642 transitions. [2022-07-11 23:55:47,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 642 transitions. [2022-07-11 23:55:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-11 23:55:47,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:47,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:47,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:55:47,544 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1304845274, now seen corresponding path program 1 times [2022-07-11 23:55:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:47,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348363537] [2022-07-11 23:55:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:55:47,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348363537] [2022-07-11 23:55:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348363537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:47,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:47,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:47,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501774456] [2022-07-11 23:55:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:47,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:47,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:47,649 INFO L87 Difference]: Start difference. First operand 413 states and 642 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) [2022-07-11 23:55:48,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:48,884 INFO L93 Difference]: Finished difference Result 842 states and 1313 transitions. [2022-07-11 23:55:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:48,885 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 120 [2022-07-11 23:55:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:48,887 INFO L225 Difference]: With dead ends: 842 [2022-07-11 23:55:48,887 INFO L226 Difference]: Without dead ends: 450 [2022-07-11 23:55:48,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:48,888 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 28 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:48,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 613 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:55:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-11 23:55:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 437. [2022-07-11 23:55:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5527522935779816) internal successors, (677), 436 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 677 transitions. [2022-07-11 23:55:48,898 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 677 transitions. Word has length 120 [2022-07-11 23:55:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:48,898 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 677 transitions. [2022-07-11 23:55:48,898 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) [2022-07-11 23:55:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 677 transitions. [2022-07-11 23:55:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-11 23:55:48,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:48,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:48,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:55:48,900 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:48,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1360190488, now seen corresponding path program 1 times [2022-07-11 23:55:48,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:48,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733965572] [2022-07-11 23:55:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:48,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:55:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:49,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733965572] [2022-07-11 23:55:49,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733965572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:49,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:49,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968563347] [2022-07-11 23:55:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:49,026 INFO L87 Difference]: Start difference. First operand 437 states and 677 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:49,590 INFO L93 Difference]: Finished difference Result 891 states and 1383 transitions. [2022-07-11 23:55:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-11 23:55:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:49,592 INFO L225 Difference]: With dead ends: 891 [2022-07-11 23:55:49,592 INFO L226 Difference]: Without dead ends: 475 [2022-07-11 23:55:49,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:49,593 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 61 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:49,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 519 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-11 23:55:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 440. [2022-07-11 23:55:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5489749430523918) internal successors, (680), 439 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) [2022-07-11 23:55:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 680 transitions. [2022-07-11 23:55:49,602 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 680 transitions. Word has length 127 [2022-07-11 23:55:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:49,603 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 680 transitions. [2022-07-11 23:55:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 680 transitions. [2022-07-11 23:55:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-11 23:55:49,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:49,605 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:49,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:55:49,605 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 276854958, now seen corresponding path program 1 times [2022-07-11 23:55:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249544160] [2022-07-11 23:55:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:55:49,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:49,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249544160] [2022-07-11 23:55:49,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249544160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:49,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:49,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60945871] [2022-07-11 23:55:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:49,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:49,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:49,722 INFO L87 Difference]: Start difference. First operand 440 states and 680 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:50,357 INFO L93 Difference]: Finished difference Result 893 states and 1384 transitions. [2022-07-11 23:55:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:50,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-11 23:55:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:50,359 INFO L225 Difference]: With dead ends: 893 [2022-07-11 23:55:50,359 INFO L226 Difference]: Without dead ends: 474 [2022-07-11 23:55:50,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:50,361 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 83 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:50,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 521 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:55:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-11 23:55:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 440. [2022-07-11 23:55:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5466970387243735) internal successors, (679), 439 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 679 transitions. [2022-07-11 23:55:50,370 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 679 transitions. Word has length 134 [2022-07-11 23:55:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:50,371 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 679 transitions. [2022-07-11 23:55:50,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 679 transitions. [2022-07-11 23:55:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-11 23:55:50,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:50,373 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:50,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:55:50,373 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1663727056, now seen corresponding path program 1 times [2022-07-11 23:55:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419840043] [2022-07-11 23:55:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:55:50,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419840043] [2022-07-11 23:55:50,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419840043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:50,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:50,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:50,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572112319] [2022-07-11 23:55:50,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:50,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:50,467 INFO L87 Difference]: Start difference. First operand 440 states and 679 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:52,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:52,678 INFO L93 Difference]: Finished difference Result 871 states and 1350 transitions. [2022-07-11 23:55:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:52,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-11 23:55:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:52,680 INFO L225 Difference]: With dead ends: 871 [2022-07-11 23:55:52,680 INFO L226 Difference]: Without dead ends: 452 [2022-07-11 23:55:52,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:52,681 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 33 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:52,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 613 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:55:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-11 23:55:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 440. [2022-07-11 23:55:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5444191343963554) internal successors, (678), 439 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 678 transitions. [2022-07-11 23:55:52,690 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 678 transitions. Word has length 134 [2022-07-11 23:55:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:52,690 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 678 transitions. [2022-07-11 23:55:52,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 678 transitions. [2022-07-11 23:55:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:55:52,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:52,692 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:52,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:55:52,693 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash 455121871, now seen corresponding path program 1 times [2022-07-11 23:55:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:52,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251880147] [2022-07-11 23:55:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:55:52,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251880147] [2022-07-11 23:55:52,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251880147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:52,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:52,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134647304] [2022-07-11 23:55:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:52,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:52,797 INFO L87 Difference]: Start difference. First operand 440 states and 678 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:53,458 INFO L93 Difference]: Finished difference Result 972 states and 1502 transitions. [2022-07-11 23:55:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:53,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-11 23:55:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:53,460 INFO L225 Difference]: With dead ends: 972 [2022-07-11 23:55:53,460 INFO L226 Difference]: Without dead ends: 553 [2022-07-11 23:55:53,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:53,461 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 130 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:53,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 412 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:55:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-11 23:55:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 470. [2022-07-11 23:55:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.535181236673774) internal successors, (720), 469 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 720 transitions. [2022-07-11 23:55:53,472 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 720 transitions. Word has length 140 [2022-07-11 23:55:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:53,472 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 720 transitions. [2022-07-11 23:55:53,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 720 transitions. [2022-07-11 23:55:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-11 23:55:53,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:53,474 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:53,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:55:53,475 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1379537561, now seen corresponding path program 1 times [2022-07-11 23:55:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:53,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695406103] [2022-07-11 23:55:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:53,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:55:53,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695406103] [2022-07-11 23:55:53,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695406103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:53,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:53,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:53,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141808833] [2022-07-11 23:55:53,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:53,586 INFO L87 Difference]: Start difference. First operand 470 states and 720 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:54,149 INFO L93 Difference]: Finished difference Result 992 states and 1522 transitions. [2022-07-11 23:55:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-11 23:55:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:54,152 INFO L225 Difference]: With dead ends: 992 [2022-07-11 23:55:54,152 INFO L226 Difference]: Without dead ends: 543 [2022-07-11 23:55:54,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:54,153 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 129 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:54,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 388 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-11 23:55:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 470. [2022-07-11 23:55:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.5223880597014925) internal successors, (714), 469 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 714 transitions. [2022-07-11 23:55:54,163 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 714 transitions. Word has length 141 [2022-07-11 23:55:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:54,164 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 714 transitions. [2022-07-11 23:55:54,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 714 transitions. [2022-07-11 23:55:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:55:54,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:54,165 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:54,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:55:54,166 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash 994754571, now seen corresponding path program 1 times [2022-07-11 23:55:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:54,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16369457] [2022-07-11 23:55:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:54,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:55:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16369457] [2022-07-11 23:55:54,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16369457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:54,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:54,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405997823] [2022-07-11 23:55:54,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:54,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:54,275 INFO L87 Difference]: Start difference. First operand 470 states and 714 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:56,523 INFO L93 Difference]: Finished difference Result 951 states and 1450 transitions. [2022-07-11 23:55:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-11 23:55:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:56,525 INFO L225 Difference]: With dead ends: 951 [2022-07-11 23:55:56,526 INFO L226 Difference]: Without dead ends: 502 [2022-07-11 23:55:56,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:56,527 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 73 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:56,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 539 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:55:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-07-11 23:55:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 470. [2022-07-11 23:55:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.5202558635394456) internal successors, (713), 469 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 713 transitions. [2022-07-11 23:55:56,536 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 713 transitions. Word has length 142 [2022-07-11 23:55:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:56,537 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 713 transitions. [2022-07-11 23:55:56,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 713 transitions. [2022-07-11 23:55:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:55:56,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:56,538 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:56,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:55:56,539 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2025795469, now seen corresponding path program 1 times [2022-07-11 23:55:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679760573] [2022-07-11 23:55:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:56,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:55:56,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:56,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679760573] [2022-07-11 23:55:56,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679760573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:56,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:56,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:55:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128843983] [2022-07-11 23:55:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:56,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:55:56,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:55:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:56,653 INFO L87 Difference]: Start difference. First operand 470 states and 713 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:56,724 INFO L93 Difference]: Finished difference Result 1365 states and 2087 transitions. [2022-07-11 23:55:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:55:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-11 23:55:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:56,728 INFO L225 Difference]: With dead ends: 1365 [2022-07-11 23:55:56,728 INFO L226 Difference]: Without dead ends: 916 [2022-07-11 23:55:56,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:56,733 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:56,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 440 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:55:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-07-11 23:55:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 916. [2022-07-11 23:55:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.5114754098360657) internal successors, (1383), 915 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1383 transitions. [2022-07-11 23:55:56,750 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1383 transitions. Word has length 142 [2022-07-11 23:55:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:56,750 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1383 transitions. [2022-07-11 23:55:56,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1383 transitions. [2022-07-11 23:55:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:55:56,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:56,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:56,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:55:56,753 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 718653071, now seen corresponding path program 1 times [2022-07-11 23:55:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:56,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483259092] [2022-07-11 23:55:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:56,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-11 23:55:56,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:56,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483259092] [2022-07-11 23:55:56,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483259092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:56,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:56,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:55:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864550837] [2022-07-11 23:55:56,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:56,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:55:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:55:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:56,859 INFO L87 Difference]: Start difference. First operand 916 states and 1383 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:56,897 INFO L93 Difference]: Finished difference Result 1838 states and 2778 transitions. [2022-07-11 23:55:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:55:56,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-11 23:55:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:56,901 INFO L225 Difference]: With dead ends: 1838 [2022-07-11 23:55:56,901 INFO L226 Difference]: Without dead ends: 943 [2022-07-11 23:55:56,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:56,903 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:56,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 422 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:55:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-07-11 23:55:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 943. [2022-07-11 23:55:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.505307855626327) internal successors, (1418), 942 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1418 transitions. [2022-07-11 23:55:56,925 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1418 transitions. Word has length 142 [2022-07-11 23:55:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:56,925 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1418 transitions. [2022-07-11 23:55:56,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1418 transitions. [2022-07-11 23:55:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:55:56,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:56,927 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:56,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:55:56,928 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1206700177, now seen corresponding path program 1 times [2022-07-11 23:55:56,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:56,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632509231] [2022-07-11 23:55:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-11 23:55:57,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:57,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632509231] [2022-07-11 23:55:57,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632509231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:57,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:57,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:55:57,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849032461] [2022-07-11 23:55:57,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:57,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:55:57,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:55:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:57,019 INFO L87 Difference]: Start difference. First operand 943 states and 1418 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:57,052 INFO L93 Difference]: Finished difference Result 1867 states and 2814 transitions. [2022-07-11 23:55:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:55:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-11 23:55:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:57,056 INFO L225 Difference]: With dead ends: 1867 [2022-07-11 23:55:57,056 INFO L226 Difference]: Without dead ends: 945 [2022-07-11 23:55:57,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:57,058 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:57,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 401 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:55:57,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-07-11 23:55:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 945. [2022-07-11 23:55:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.5042372881355932) internal successors, (1420), 944 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1420 transitions. [2022-07-11 23:55:57,088 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1420 transitions. Word has length 142 [2022-07-11 23:55:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:57,089 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1420 transitions. [2022-07-11 23:55:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1420 transitions. [2022-07-11 23:55:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-11 23:55:57,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:57,091 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:57,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:55:57,091 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash 318669239, now seen corresponding path program 1 times [2022-07-11 23:55:57,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:57,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846552681] [2022-07-11 23:55:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:57,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:55:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846552681] [2022-07-11 23:55:57,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846552681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:57,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:55:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911227075] [2022-07-11 23:55:57,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:55:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:55:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:57,189 INFO L87 Difference]: Start difference. First operand 945 states and 1420 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:57,250 INFO L93 Difference]: Finished difference Result 2313 states and 3499 transitions. [2022-07-11 23:55:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:55:57,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-11 23:55:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:57,256 INFO L225 Difference]: With dead ends: 2313 [2022-07-11 23:55:57,256 INFO L226 Difference]: Without dead ends: 1391 [2022-07-11 23:55:57,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:55:57,259 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 153 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:57,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 582 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:55:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-07-11 23:55:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1391. [2022-07-11 23:55:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 1.5035971223021583) internal successors, (2090), 1390 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2090 transitions. [2022-07-11 23:55:57,311 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2090 transitions. Word has length 144 [2022-07-11 23:55:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:57,311 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 2090 transitions. [2022-07-11 23:55:57,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2090 transitions. [2022-07-11 23:55:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-11 23:55:57,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:57,314 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:57,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:55:57,315 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1872672834, now seen corresponding path program 1 times [2022-07-11 23:55:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:57,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605336078] [2022-07-11 23:55:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-11 23:55:57,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:57,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605336078] [2022-07-11 23:55:57,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605336078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:57,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:57,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:57,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429951032] [2022-07-11 23:55:57,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:57,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:57,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:57,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:57,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:57,447 INFO L87 Difference]: Start difference. First operand 1391 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:57,878 INFO L93 Difference]: Finished difference Result 2912 states and 4381 transitions. [2022-07-11 23:55:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-11 23:55:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:57,883 INFO L225 Difference]: With dead ends: 2912 [2022-07-11 23:55:57,883 INFO L226 Difference]: Without dead ends: 1544 [2022-07-11 23:55:57,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:57,885 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 42 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:57,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 629 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:55:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-07-11 23:55:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1475. [2022-07-11 23:55:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 1.505427408412483) internal successors, (2219), 1474 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2219 transitions. [2022-07-11 23:55:57,911 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2219 transitions. Word has length 173 [2022-07-11 23:55:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:57,912 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 2219 transitions. [2022-07-11 23:55:57,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2219 transitions. [2022-07-11 23:55:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-11 23:55:57,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:57,915 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:57,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:55:57,915 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 967508936, now seen corresponding path program 1 times [2022-07-11 23:55:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911329967] [2022-07-11 23:55:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-11 23:55:58,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:58,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911329967] [2022-07-11 23:55:58,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911329967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:58,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57840739] [2022-07-11 23:55:58,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:58,083 INFO L87 Difference]: Start difference. First operand 1475 states and 2219 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:58,637 INFO L93 Difference]: Finished difference Result 3138 states and 4698 transitions. [2022-07-11 23:55:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:58,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-07-11 23:55:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:58,645 INFO L225 Difference]: With dead ends: 3138 [2022-07-11 23:55:58,645 INFO L226 Difference]: Without dead ends: 1686 [2022-07-11 23:55:58,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:58,648 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 141 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:58,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 390 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-07-11 23:55:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1475. [2022-07-11 23:55:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 1.491180461329715) internal successors, (2198), 1474 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2198 transitions. [2022-07-11 23:55:58,680 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2198 transitions. Word has length 187 [2022-07-11 23:55:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:58,680 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 2198 transitions. [2022-07-11 23:55:58,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2198 transitions. [2022-07-11 23:55:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-11 23:55:58,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:58,684 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:58,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:55:58,684 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:58,685 INFO L85 PathProgramCache]: Analyzing trace with hash -777154267, now seen corresponding path program 1 times [2022-07-11 23:55:58,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167262618] [2022-07-11 23:55:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:58,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-11 23:55:58,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:58,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167262618] [2022-07-11 23:55:58,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167262618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:58,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227056194] [2022-07-11 23:55:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:58,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:58,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:55:58,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:55:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:55:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-11 23:55:59,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:55:59,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227056194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:59,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:55:59,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 23:55:59,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224668488] [2022-07-11 23:55:59,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:55:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:55:59,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:55:59,628 INFO L87 Difference]: Start difference. First operand 1475 states and 2198 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:59,713 INFO L93 Difference]: Finished difference Result 3402 states and 5092 transitions. [2022-07-11 23:55:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:55:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-11 23:55:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:59,720 INFO L225 Difference]: With dead ends: 3402 [2022-07-11 23:55:59,720 INFO L226 Difference]: Without dead ends: 1950 [2022-07-11 23:55:59,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:55:59,723 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:59,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 381 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:55:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-07-11 23:55:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1950. [2022-07-11 23:55:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 1.4930733709594664) internal successors, (2910), 1949 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 2910 transitions. [2022-07-11 23:55:59,771 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 2910 transitions. Word has length 195 [2022-07-11 23:55:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:59,772 INFO L495 AbstractCegarLoop]: Abstraction has 1950 states and 2910 transitions. [2022-07-11 23:55:59,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:55:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 2910 transitions. [2022-07-11 23:55:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-11 23:55:59,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:59,776 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:59,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:56:00,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-11 23:56:00,004 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:00,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1785235534, now seen corresponding path program 1 times [2022-07-11 23:56:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:00,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349238168] [2022-07-11 23:56:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-11 23:56:00,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:00,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349238168] [2022-07-11 23:56:00,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349238168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:00,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:00,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:00,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709922585] [2022-07-11 23:56:00,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:00,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:00,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:00,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:00,189 INFO L87 Difference]: Start difference. First operand 1950 states and 2910 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:00,264 INFO L93 Difference]: Finished difference Result 4352 states and 6516 transitions. [2022-07-11 23:56:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-07-11 23:56:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:00,272 INFO L225 Difference]: With dead ends: 4352 [2022-07-11 23:56:00,272 INFO L226 Difference]: Without dead ends: 2425 [2022-07-11 23:56:00,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:00,275 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:00,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 380 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-07-11 23:56:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2425. [2022-07-11 23:56:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.4946369636963697) internal successors, (3623), 2424 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 3623 transitions. [2022-07-11 23:56:00,325 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 3623 transitions. Word has length 197 [2022-07-11 23:56:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:00,325 INFO L495 AbstractCegarLoop]: Abstraction has 2425 states and 3623 transitions. [2022-07-11 23:56:00,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 3623 transitions. [2022-07-11 23:56:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-11 23:56:00,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:00,330 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:00,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:56:00,330 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1494612329, now seen corresponding path program 1 times [2022-07-11 23:56:00,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:00,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494415954] [2022-07-11 23:56:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:00,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-11 23:56:00,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494415954] [2022-07-11 23:56:00,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494415954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:00,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:00,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36414084] [2022-07-11 23:56:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:00,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:00,493 INFO L87 Difference]: Start difference. First operand 2425 states and 3623 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2022-07-11 23:56:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:00,597 INFO L93 Difference]: Finished difference Result 5302 states and 7942 transitions. [2022-07-11 23:56:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:00,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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 236 [2022-07-11 23:56:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:00,621 INFO L225 Difference]: With dead ends: 5302 [2022-07-11 23:56:00,622 INFO L226 Difference]: Without dead ends: 2900 [2022-07-11 23:56:00,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:00,627 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:00,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 379 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:56:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2022-07-11 23:56:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2900. [2022-07-11 23:56:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 1.4960331148671955) internal successors, (4337), 2899 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 4337 transitions. [2022-07-11 23:56:00,688 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 4337 transitions. Word has length 236 [2022-07-11 23:56:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:00,689 INFO L495 AbstractCegarLoop]: Abstraction has 2900 states and 4337 transitions. [2022-07-11 23:56:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2022-07-11 23:56:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 4337 transitions. [2022-07-11 23:56:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-11 23:56:00,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:00,695 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:00,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:56:00,695 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1051431597, now seen corresponding path program 1 times [2022-07-11 23:56:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:00,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378784371] [2022-07-11 23:56:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-11 23:56:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378784371] [2022-07-11 23:56:00,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378784371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:00,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:00,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:00,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708754612] [2022-07-11 23:56:00,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:00,871 INFO L87 Difference]: Start difference. First operand 2900 states and 4337 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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) [2022-07-11 23:56:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:00,975 INFO L93 Difference]: Finished difference Result 6252 states and 9370 transitions. [2022-07-11 23:56:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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 238 [2022-07-11 23:56:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:00,982 INFO L225 Difference]: With dead ends: 6252 [2022-07-11 23:56:00,982 INFO L226 Difference]: Without dead ends: 3375 [2022-07-11 23:56:00,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:00,985 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:00,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 378 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-07-11 23:56:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3375. [2022-07-11 23:56:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3375 states, 3374 states have (on average 1.4973325429756965) internal successors, (5052), 3374 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 5052 transitions. [2022-07-11 23:56:01,079 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 5052 transitions. Word has length 238 [2022-07-11 23:56:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:01,080 INFO L495 AbstractCegarLoop]: Abstraction has 3375 states and 5052 transitions. [2022-07-11 23:56:01,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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) [2022-07-11 23:56:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 5052 transitions. [2022-07-11 23:56:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-11 23:56:01,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:01,088 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:56:01,088 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash 205602834, now seen corresponding path program 1 times [2022-07-11 23:56:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299757038] [2022-07-11 23:56:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-07-11 23:56:01,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:01,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299757038] [2022-07-11 23:56:01,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299757038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:01,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:01,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:01,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153561672] [2022-07-11 23:56:01,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:01,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:01,281 INFO L87 Difference]: Start difference. First operand 3375 states and 5052 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:01,371 INFO L93 Difference]: Finished difference Result 7196 states and 10791 transitions. [2022-07-11 23:56:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-07-11 23:56:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:01,378 INFO L225 Difference]: With dead ends: 7196 [2022-07-11 23:56:01,378 INFO L226 Difference]: Without dead ends: 3844 [2022-07-11 23:56:01,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:01,382 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:01,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 581 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-07-11 23:56:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3844. [2022-07-11 23:56:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3843 states have (on average 1.4967473328129066) internal successors, (5752), 3843 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5752 transitions. [2022-07-11 23:56:01,457 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5752 transitions. Word has length 270 [2022-07-11 23:56:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:01,458 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 5752 transitions. [2022-07-11 23:56:01,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5752 transitions. [2022-07-11 23:56:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-11 23:56:01,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:01,466 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:01,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:56:01,466 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 629249556, now seen corresponding path program 1 times [2022-07-11 23:56:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:01,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480825675] [2022-07-11 23:56:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:01,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-11 23:56:01,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480825675] [2022-07-11 23:56:01,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480825675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:01,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:01,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359205917] [2022-07-11 23:56:01,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:01,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:01,648 INFO L87 Difference]: Start difference. First operand 3844 states and 5752 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:01,754 INFO L93 Difference]: Finished difference Result 8107 states and 12151 transitions. [2022-07-11 23:56:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:01,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-07-11 23:56:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:01,762 INFO L225 Difference]: With dead ends: 8107 [2022-07-11 23:56:01,763 INFO L226 Difference]: Without dead ends: 4286 [2022-07-11 23:56:01,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:01,768 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:01,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 584 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-07-11 23:56:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 4286. [2022-07-11 23:56:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 1.4959159859976663) internal successors, (6410), 4285 states have internal predecessors, (6410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6410 transitions. [2022-07-11 23:56:01,894 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6410 transitions. Word has length 270 [2022-07-11 23:56:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:01,895 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 6410 transitions. [2022-07-11 23:56:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6410 transitions. [2022-07-11 23:56:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-11 23:56:01,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:01,905 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:01,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:56:01,906 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash 152506759, now seen corresponding path program 1 times [2022-07-11 23:56:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:01,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13530234] [2022-07-11 23:56:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:01,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-07-11 23:56:02,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:02,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13530234] [2022-07-11 23:56:02,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13530234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:02,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:02,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291529450] [2022-07-11 23:56:02,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:02,115 INFO L87 Difference]: Start difference. First operand 4286 states and 6410 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:02,271 INFO L93 Difference]: Finished difference Result 9024 states and 13516 transitions. [2022-07-11 23:56:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-07-11 23:56:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:02,279 INFO L225 Difference]: With dead ends: 9024 [2022-07-11 23:56:02,279 INFO L226 Difference]: Without dead ends: 4761 [2022-07-11 23:56:02,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:02,284 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:02,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 375 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:56:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2022-07-11 23:56:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4761. [2022-07-11 23:56:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4760 states have (on average 1.4974789915966387) internal successors, (7128), 4760 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 7128 transitions. [2022-07-11 23:56:02,374 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 7128 transitions. Word has length 345 [2022-07-11 23:56:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:02,375 INFO L495 AbstractCegarLoop]: Abstraction has 4761 states and 7128 transitions. [2022-07-11 23:56:02,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 7128 transitions. [2022-07-11 23:56:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-07-11 23:56:02,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:02,384 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:56:02,385 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1429551548, now seen corresponding path program 1 times [2022-07-11 23:56:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758560547] [2022-07-11 23:56:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2022-07-11 23:56:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758560547] [2022-07-11 23:56:02,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758560547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:02,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:02,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208728762] [2022-07-11 23:56:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:02,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:02,587 INFO L87 Difference]: Start difference. First operand 4761 states and 7128 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:02,711 INFO L93 Difference]: Finished difference Result 9974 states and 14952 transitions. [2022-07-11 23:56:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2022-07-11 23:56:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:02,721 INFO L225 Difference]: With dead ends: 9974 [2022-07-11 23:56:02,721 INFO L226 Difference]: Without dead ends: 5236 [2022-07-11 23:56:02,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:02,728 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:02,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 374 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-07-11 23:56:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 5236. [2022-07-11 23:56:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5235 states have (on average 1.4989493791786055) internal successors, (7847), 5235 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 7847 transitions. [2022-07-11 23:56:02,858 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 7847 transitions. Word has length 386 [2022-07-11 23:56:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:02,858 INFO L495 AbstractCegarLoop]: Abstraction has 5236 states and 7847 transitions. [2022-07-11 23:56:02,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 7847 transitions. [2022-07-11 23:56:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-07-11 23:56:02,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:02,867 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:02,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:56:02,867 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash -720784750, now seen corresponding path program 1 times [2022-07-11 23:56:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:02,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318554666] [2022-07-11 23:56:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:02,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2022-07-11 23:56:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:03,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318554666] [2022-07-11 23:56:03,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318554666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:03,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:03,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:03,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574206907] [2022-07-11 23:56:03,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:03,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:03,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:03,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:03,065 INFO L87 Difference]: Start difference. First operand 5236 states and 7847 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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) [2022-07-11 23:56:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:03,187 INFO L93 Difference]: Finished difference Result 10919 states and 16383 transitions. [2022-07-11 23:56:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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 393 [2022-07-11 23:56:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:03,198 INFO L225 Difference]: With dead ends: 10919 [2022-07-11 23:56:03,199 INFO L226 Difference]: Without dead ends: 5706 [2022-07-11 23:56:03,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:03,205 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 146 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:03,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 581 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2022-07-11 23:56:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 5706. [2022-07-11 23:56:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5706 states, 5705 states have (on average 1.4983347940403156) internal successors, (8548), 5705 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5706 states to 5706 states and 8548 transitions. [2022-07-11 23:56:03,347 INFO L78 Accepts]: Start accepts. Automaton has 5706 states and 8548 transitions. Word has length 393 [2022-07-11 23:56:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:03,348 INFO L495 AbstractCegarLoop]: Abstraction has 5706 states and 8548 transitions. [2022-07-11 23:56:03,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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) [2022-07-11 23:56:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5706 states and 8548 transitions. [2022-07-11 23:56:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-07-11 23:56:03,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:03,358 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:03,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-11 23:56:03,359 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash -397342583, now seen corresponding path program 1 times [2022-07-11 23:56:03,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:03,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597233266] [2022-07-11 23:56:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:03,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-07-11 23:56:03,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597233266] [2022-07-11 23:56:03,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597233266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:03,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:03,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402776951] [2022-07-11 23:56:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:03,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:03,586 INFO L87 Difference]: Start difference. First operand 5706 states and 8548 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:03,752 INFO L93 Difference]: Finished difference Result 11864 states and 17792 transitions. [2022-07-11 23:56:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-07-11 23:56:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:03,761 INFO L225 Difference]: With dead ends: 11864 [2022-07-11 23:56:03,762 INFO L226 Difference]: Without dead ends: 6181 [2022-07-11 23:56:03,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:03,768 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:03,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 372 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:56:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6181 states. [2022-07-11 23:56:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6181 to 6181. [2022-07-11 23:56:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 1.4998381877022653) internal successors, (9269), 6180 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 9269 transitions. [2022-07-11 23:56:03,905 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 9269 transitions. Word has length 469 [2022-07-11 23:56:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:03,905 INFO L495 AbstractCegarLoop]: Abstraction has 6181 states and 9269 transitions. [2022-07-11 23:56:03,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 9269 transitions. [2022-07-11 23:56:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-07-11 23:56:03,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:03,918 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:03,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-11 23:56:03,919 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1210425039, now seen corresponding path program 1 times [2022-07-11 23:56:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443626769] [2022-07-11 23:56:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-07-11 23:56:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443626769] [2022-07-11 23:56:04,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443626769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:04,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:04,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:04,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907096780] [2022-07-11 23:56:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:04,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:04,190 INFO L87 Difference]: Start difference. First operand 6181 states and 9269 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:04,334 INFO L93 Difference]: Finished difference Result 6658 states and 9993 transitions. [2022-07-11 23:56:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2022-07-11 23:56:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:04,349 INFO L225 Difference]: With dead ends: 6658 [2022-07-11 23:56:04,349 INFO L226 Difference]: Without dead ends: 6656 [2022-07-11 23:56:04,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:04,354 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:04,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 371 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:56:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2022-07-11 23:56:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 6656. [2022-07-11 23:56:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 1.5012772351615327) internal successors, (9991), 6655 states have internal predecessors, (9991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 9991 transitions. [2022-07-11 23:56:04,520 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 9991 transitions. Word has length 511 [2022-07-11 23:56:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:04,521 INFO L495 AbstractCegarLoop]: Abstraction has 6656 states and 9991 transitions. [2022-07-11 23:56:04,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 9991 transitions. [2022-07-11 23:56:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-11 23:56:04,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:04,539 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:04,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-11 23:56:04,539 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1317172119, now seen corresponding path program 1 times [2022-07-11 23:56:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27512008] [2022-07-11 23:56:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2022-07-11 23:56:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27512008] [2022-07-11 23:56:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27512008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:04,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:04,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:04,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290732108] [2022-07-11 23:56:04,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:04,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:04,816 INFO L87 Difference]: Start difference. First operand 6656 states and 9991 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:06,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:06,713 INFO L93 Difference]: Finished difference Result 14450 states and 21637 transitions. [2022-07-11 23:56:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:06,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-07-11 23:56:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:06,727 INFO L225 Difference]: With dead ends: 14450 [2022-07-11 23:56:06,728 INFO L226 Difference]: Without dead ends: 7817 [2022-07-11 23:56:06,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:56:06,735 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 71 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:06,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 681 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:56:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2022-07-11 23:56:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7230. [2022-07-11 23:56:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 1.5021441416516808) internal successors, (10859), 7229 states have internal predecessors, (10859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 10859 transitions. [2022-07-11 23:56:06,883 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 10859 transitions. Word has length 519 [2022-07-11 23:56:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:06,883 INFO L495 AbstractCegarLoop]: Abstraction has 7230 states and 10859 transitions. [2022-07-11 23:56:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 10859 transitions. [2022-07-11 23:56:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-11 23:56:06,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:06,894 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:06,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-11 23:56:06,894 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1566627227, now seen corresponding path program 1 times [2022-07-11 23:56:06,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:06,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969092359] [2022-07-11 23:56:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:06,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1268 proven. 24 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2022-07-11 23:56:07,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:07,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969092359] [2022-07-11 23:56:07,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969092359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:07,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966858193] [2022-07-11 23:56:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:07,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:07,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:07,391 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) [2022-07-11 23:56:07,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:56:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2391 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:56:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:08,498 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-11 23:56:08,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-11 23:56:08,532 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 13 [2022-07-11 23:56:08,552 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-07-11 23:56:08,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 33 [2022-07-11 23:56:08,651 INFO L356 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-07-11 23:56:08,652 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 33 treesize of output 45 [2022-07-11 23:56:08,731 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 [2022-07-11 23:56:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1264 proven. 0 refuted. 0 times theorem prover too weak. 1264 trivial. 0 not checked. [2022-07-11 23:56:08,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:56:08,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966858193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:08,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:56:08,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-07-11 23:56:08,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268533079] [2022-07-11 23:56:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:08,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:56:08,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:56:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:56:08,742 INFO L87 Difference]: Start difference. First operand 7230 states and 10859 transitions. Second operand has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:09,922 INFO L93 Difference]: Finished difference Result 15257 states and 22846 transitions. [2022-07-11 23:56:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:56:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-07-11 23:56:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:09,937 INFO L225 Difference]: With dead ends: 15257 [2022-07-11 23:56:09,937 INFO L226 Difference]: Without dead ends: 8050 [2022-07-11 23:56:09,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:56:09,949 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 41 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:09,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 977 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 145 Unchecked, 1.0s Time] [2022-07-11 23:56:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8050 states. [2022-07-11 23:56:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8050 to 7755. [2022-07-11 23:56:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7755 states, 7754 states have (on average 1.5018055197317512) internal successors, (11645), 7754 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7755 states to 7755 states and 11645 transitions. [2022-07-11 23:56:10,165 INFO L78 Accepts]: Start accepts. Automaton has 7755 states and 11645 transitions. Word has length 519 [2022-07-11 23:56:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:10,166 INFO L495 AbstractCegarLoop]: Abstraction has 7755 states and 11645 transitions. [2022-07-11 23:56:10,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7755 states and 11645 transitions. [2022-07-11 23:56:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-11 23:56:10,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:10,179 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:10,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:56:10,403 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,SelfDestructingSolverStorable46 [2022-07-11 23:56:10,404 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash 733561204, now seen corresponding path program 1 times [2022-07-11 23:56:10,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951596625] [2022-07-11 23:56:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2530 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2022-07-11 23:56:10,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:10,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951596625] [2022-07-11 23:56:10,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951596625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:10,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:10,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306440270] [2022-07-11 23:56:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:10,697 INFO L87 Difference]: Start difference. First operand 7755 states and 11645 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:12,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:12,849 INFO L93 Difference]: Finished difference Result 16060 states and 24049 transitions. [2022-07-11 23:56:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 520 [2022-07-11 23:56:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:12,865 INFO L225 Difference]: With dead ends: 16060 [2022-07-11 23:56:12,865 INFO L226 Difference]: Without dead ends: 8328 [2022-07-11 23:56:12,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:56:12,873 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 69 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:12,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 679 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:56:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8328 states. [2022-07-11 23:56:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 7769. [2022-07-11 23:56:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7768 states have (on average 1.500901132852729) internal successors, (11659), 7768 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 11659 transitions. [2022-07-11 23:56:13,035 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 11659 transitions. Word has length 520 [2022-07-11 23:56:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:13,036 INFO L495 AbstractCegarLoop]: Abstraction has 7769 states and 11659 transitions. [2022-07-11 23:56:13,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 11659 transitions. [2022-07-11 23:56:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-07-11 23:56:13,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:13,048 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:13,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-11 23:56:13,048 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1703260270, now seen corresponding path program 1 times [2022-07-11 23:56:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:13,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546743182] [2022-07-11 23:56:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:13,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1268 proven. 24 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2022-07-11 23:56:13,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546743182] [2022-07-11 23:56:13,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546743182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:13,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116347561] [2022-07-11 23:56:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:13,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:13,556 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) [2022-07-11 23:56:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:56:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2400 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-11 23:56:14,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:14,673 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:14,675 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 [2022-07-11 23:56:14,711 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:56:14,711 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 [2022-07-11 23:56:14,725 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-11 23:56:14,727 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 23:56:14,761 INFO L356 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2022-07-11 23:56:14,762 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2022-07-11 23:56:14,784 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-11 23:56:14,785 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 64 [2022-07-11 23:56:14,805 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-07-11 23:56:14,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2022-07-11 23:56:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:14,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-11 23:56:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:14,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-11 23:56:14,862 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:14,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2022-07-11 23:56:15,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:15,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2022-07-11 23:56:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:15,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2022-07-11 23:56:15,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:15,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2022-07-11 23:56:15,453 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:15,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:56:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:15,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:56:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:15,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:56:15,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-11 23:56:15,475 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 27 treesize of output 15 [2022-07-11 23:56:15,477 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 [2022-07-11 23:56:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1260 proven. 163 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2022-07-11 23:56:15,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:56:16,042 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 608 treesize of output 494 [2022-07-11 23:56:19,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:56:19,272 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 22738 treesize of output 22126 [2022-07-11 23:56:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:56:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1266 proven. 2 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-07-11 23:56:19,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116347561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:56:19,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:56:19,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 28 [2022-07-11 23:56:19,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961797554] [2022-07-11 23:56:19,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:56:19,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-11 23:56:19,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:19,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-11 23:56:19,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-07-11 23:56:19,614 INFO L87 Difference]: Start difference. First operand 7769 states and 11659 transitions. Second operand has 28 states, 28 states have (on average 11.928571428571429) internal successors, (334), 28 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:21,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:23,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:25,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:27,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:29,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:30,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:32,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:34,979 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 [] [2022-07-11 23:56:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:49,217 INFO L93 Difference]: Finished difference Result 69413 states and 103365 transitions. [2022-07-11 23:56:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-11 23:56:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 11.928571428571429) internal successors, (334), 28 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 522 [2022-07-11 23:56:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:49,316 INFO L225 Difference]: With dead ends: 69413 [2022-07-11 23:56:49,316 INFO L226 Difference]: Without dead ends: 61667 [2022-07-11 23:56:49,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1217 GetRequests, 1088 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5542 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2411, Invalid=14359, Unknown=0, NotChecked=0, Total=16770 [2022-07-11 23:56:49,340 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 3700 mSDsluCounter, 11211 mSDsCounter, 0 mSdLazyCounter, 10230 mSolverCounterSat, 724 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 12058 SdHoareTripleChecker+Invalid, 15276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 10230 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 4315 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:49,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 12058 Invalid, 15276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 10230 Invalid, 7 Unknown, 4315 Unchecked, 25.5s Time] [2022-07-11 23:56:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61667 states. [2022-07-11 23:56:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61667 to 39803. [2022-07-11 23:56:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39803 states, 39802 states have (on average 1.491231596402191) internal successors, (59354), 39802 states have internal predecessors, (59354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39803 states to 39803 states and 59354 transitions. [2022-07-11 23:56:50,503 INFO L78 Accepts]: Start accepts. Automaton has 39803 states and 59354 transitions. Word has length 522 [2022-07-11 23:56:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:50,504 INFO L495 AbstractCegarLoop]: Abstraction has 39803 states and 59354 transitions. [2022-07-11 23:56:50,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.928571428571429) internal successors, (334), 28 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39803 states and 59354 transitions. [2022-07-11 23:56:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-07-11 23:56:50,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:50,549 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:50,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:56:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:50,776 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1332503124, now seen corresponding path program 1 times [2022-07-11 23:56:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401020648] [2022-07-11 23:56:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1225 proven. 187 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2022-07-11 23:56:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401020648] [2022-07-11 23:56:51,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401020648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366465112] [2022-07-11 23:56:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:51,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:51,052 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) [2022-07-11 23:56:51,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:56:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 2472 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:56:52,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:52,287 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:52,287 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 [2022-07-11 23:56:52,318 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:56:52,318 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 [2022-07-11 23:56:52,330 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 23:56:52,347 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:52,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:56:52,374 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 [2022-07-11 23:56:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1226 proven. 176 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2022-07-11 23:56:52,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:56:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1231 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2022-07-11 23:56:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366465112] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:52,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:56:52,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-11 23:56:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621121949] [2022-07-11 23:56:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:56:52,426 INFO L87 Difference]: Start difference. First operand 39803 states and 59354 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:54,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:55,555 INFO L93 Difference]: Finished difference Result 82901 states and 123371 transitions. [2022-07-11 23:56:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2022-07-11 23:56:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:55,729 INFO L225 Difference]: With dead ends: 82901 [2022-07-11 23:56:55,729 INFO L226 Difference]: Without dead ends: 43121 [2022-07-11 23:56:55,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1081 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:56:55,778 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 136 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:55,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 437 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43121 states. [2022-07-11 23:56:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43121 to 39803. [2022-07-11 23:56:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39803 states, 39802 states have (on average 1.4693482739560826) internal successors, (58483), 39802 states have internal predecessors, (58483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39803 states to 39803 states and 58483 transitions. [2022-07-11 23:56:56,681 INFO L78 Accepts]: Start accepts. Automaton has 39803 states and 58483 transitions. Word has length 541 [2022-07-11 23:56:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:56,682 INFO L495 AbstractCegarLoop]: Abstraction has 39803 states and 58483 transitions. [2022-07-11 23:56:56,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 39803 states and 58483 transitions. [2022-07-11 23:56:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-07-11 23:56:56,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:56,721 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:56,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:56:56,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-11 23:56:56,929 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash 642086016, now seen corresponding path program 1 times [2022-07-11 23:56:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:56,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061910460] [2022-07-11 23:56:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:56,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1135 proven. 46 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2022-07-11 23:56:57,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:57,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061910460] [2022-07-11 23:56:57,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061910460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770596264] [2022-07-11 23:56:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:57,198 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) [2022-07-11 23:56:57,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:56:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 23:56:58,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:58,472 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:58,473 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 [2022-07-11 23:56:58,504 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:56:58,504 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 [2022-07-11 23:56:58,532 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 [2022-07-11 23:56:58,546 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:58,546 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 [2022-07-11 23:56:58,610 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 [2022-07-11 23:56:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1130 proven. 238 refuted. 0 times theorem prover too weak. 1438 trivial. 0 not checked. [2022-07-11 23:56:58,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:56:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1103 proven. 0 refuted. 0 times theorem prover too weak. 1703 trivial. 0 not checked. [2022-07-11 23:56:58,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770596264] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:58,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:56:58,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-11 23:56:58,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981051555] [2022-07-11 23:56:58,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:58,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:56:58,696 INFO L87 Difference]: Start difference. First operand 39803 states and 58483 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:59,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:01,232 INFO L93 Difference]: Finished difference Result 84213 states and 123527 transitions. [2022-07-11 23:57:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2022-07-11 23:57:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:01,307 INFO L225 Difference]: With dead ends: 84213 [2022-07-11 23:57:01,307 INFO L226 Difference]: Without dead ends: 44433 [2022-07-11 23:57:01,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1080 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:57:01,330 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 117 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:01,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 547 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:57:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44433 states. [2022-07-11 23:57:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44433 to 39831. [2022-07-11 23:57:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39831 states, 39830 states have (on average 1.4683153401958322) internal successors, (58483), 39830 states have internal predecessors, (58483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39831 states to 39831 states and 58483 transitions. [2022-07-11 23:57:02,283 INFO L78 Accepts]: Start accepts. Automaton has 39831 states and 58483 transitions. Word has length 541 [2022-07-11 23:57:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:02,284 INFO L495 AbstractCegarLoop]: Abstraction has 39831 states and 58483 transitions. [2022-07-11 23:57:02,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 39831 states and 58483 transitions. [2022-07-11 23:57:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-11 23:57:02,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:02,330 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:02,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 23:57:02,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:02,531 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1547618676, now seen corresponding path program 1 times [2022-07-11 23:57:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:02,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290752335] [2022-07-11 23:57:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1244 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2022-07-11 23:57:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:02,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290752335] [2022-07-11 23:57:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290752335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:02,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:02,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194160868] [2022-07-11 23:57:02,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:02,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:02,780 INFO L87 Difference]: Start difference. First operand 39831 states and 58483 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:04,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:06,116 INFO L93 Difference]: Finished difference Result 82343 states and 120619 transitions. [2022-07-11 23:57:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 542 [2022-07-11 23:57:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:06,173 INFO L225 Difference]: With dead ends: 82343 [2022-07-11 23:57:06,174 INFO L226 Difference]: Without dead ends: 42535 [2022-07-11 23:57:06,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:06,201 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 82 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:06,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 669 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:57:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42535 states. [2022-07-11 23:57:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42535 to 39831. [2022-07-11 23:57:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39831 states, 39830 states have (on average 1.4663319106201356) internal successors, (58404), 39830 states have internal predecessors, (58404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39831 states to 39831 states and 58404 transitions. [2022-07-11 23:57:07,209 INFO L78 Accepts]: Start accepts. Automaton has 39831 states and 58404 transitions. Word has length 542 [2022-07-11 23:57:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:07,209 INFO L495 AbstractCegarLoop]: Abstraction has 39831 states and 58404 transitions. [2022-07-11 23:57:07,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 39831 states and 58404 transitions. [2022-07-11 23:57:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-11 23:57:07,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:07,253 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-11 23:57:07,254 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1552783085, now seen corresponding path program 1 times [2022-07-11 23:57:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:07,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177999635] [2022-07-11 23:57:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1076 proven. 0 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2022-07-11 23:57:07,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:07,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177999635] [2022-07-11 23:57:07,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177999635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:07,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:07,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996038822] [2022-07-11 23:57:07,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:07,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:07,589 INFO L87 Difference]: Start difference. First operand 39831 states and 58404 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:09,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:10,683 INFO L93 Difference]: Finished difference Result 82859 states and 121283 transitions. [2022-07-11 23:57:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:10,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 542 [2022-07-11 23:57:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:10,746 INFO L225 Difference]: With dead ends: 82859 [2022-07-11 23:57:10,746 INFO L226 Difference]: Without dead ends: 43051 [2022-07-11 23:57:10,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:10,776 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 29 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:10,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 611 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:57:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43051 states. [2022-07-11 23:57:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43051 to 41875. [2022-07-11 23:57:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41875 states, 41874 states have (on average 1.4622916368152075) internal successors, (61232), 41874 states have internal predecessors, (61232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41875 states to 41875 states and 61232 transitions. [2022-07-11 23:57:11,843 INFO L78 Accepts]: Start accepts. Automaton has 41875 states and 61232 transitions. Word has length 542 [2022-07-11 23:57:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 41875 states and 61232 transitions. [2022-07-11 23:57:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 41875 states and 61232 transitions. [2022-07-11 23:57:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-07-11 23:57:11,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:11,885 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-11 23:57:11,885 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1279426707, now seen corresponding path program 1 times [2022-07-11 23:57:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:11,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084229096] [2022-07-11 23:57:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 1096 proven. 0 refuted. 0 times theorem prover too weak. 1757 trivial. 0 not checked. [2022-07-11 23:57:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084229096] [2022-07-11 23:57:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084229096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:12,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:12,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:12,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725724120] [2022-07-11 23:57:12,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:12,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:12,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:12,122 INFO L87 Difference]: Start difference. First operand 41875 states and 61232 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:13,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:14,838 INFO L93 Difference]: Finished difference Result 85379 states and 124784 transitions. [2022-07-11 23:57:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 545 [2022-07-11 23:57:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:14,967 INFO L225 Difference]: With dead ends: 85379 [2022-07-11 23:57:14,967 INFO L226 Difference]: Without dead ends: 43527 [2022-07-11 23:57:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:14,984 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 43 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:14,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 626 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:57:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43527 states. [2022-07-11 23:57:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43527 to 41861. [2022-07-11 23:57:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41861 states, 41860 states have (on average 1.4607740086000955) internal successors, (61148), 41860 states have internal predecessors, (61148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41861 states to 41861 states and 61148 transitions. [2022-07-11 23:57:15,952 INFO L78 Accepts]: Start accepts. Automaton has 41861 states and 61148 transitions. Word has length 545 [2022-07-11 23:57:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:15,953 INFO L495 AbstractCegarLoop]: Abstraction has 41861 states and 61148 transitions. [2022-07-11 23:57:15,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 41861 states and 61148 transitions. [2022-07-11 23:57:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2022-07-11 23:57:15,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:15,996 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:15,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-11 23:57:15,996 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -666859260, now seen corresponding path program 1 times [2022-07-11 23:57:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353215989] [2022-07-11 23:57:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1392 proven. 338 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2022-07-11 23:57:17,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353215989] [2022-07-11 23:57:17,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353215989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259682037] [2022-07-11 23:57:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:17,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:17,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:57:17,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:57:17,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:57:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 23:57:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:57:18,417 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:57:18,417 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 [2022-07-11 23:57:18,443 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:57:18,443 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 [2022-07-11 23:57:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:18,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:57:18,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-11 23:57:18,569 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 13 [2022-07-11 23:57:18,604 INFO L356 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2022-07-11 23:57:18,604 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 33 treesize of output 55 [2022-07-11 23:57:18,697 INFO L356 Elim1Store]: treesize reduction 80, result has 35.0 percent of original size [2022-07-11 23:57:18,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 67 [2022-07-11 23:57:18,787 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:57:18,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 23:57:18,845 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 [2022-07-11 23:57:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1785 proven. 72 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2022-07-11 23:57:18,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:57:19,037 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 38 treesize of output 26 [2022-07-11 23:57:19,040 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 26 treesize of output 20 [2022-07-11 23:57:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1598 proven. 0 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2022-07-11 23:57:21,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259682037] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:21,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:57:21,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 9] total 23 [2022-07-11 23:57:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763175720] [2022-07-11 23:57:21,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:21,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:57:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:57:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-11 23:57:21,114 INFO L87 Difference]: Start difference. First operand 41861 states and 61148 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:23,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:25,115 INFO L93 Difference]: Finished difference Result 119017 states and 173674 transitions. [2022-07-11 23:57:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:57:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 548 [2022-07-11 23:57:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:25,218 INFO L225 Difference]: With dead ends: 119017 [2022-07-11 23:57:25,219 INFO L226 Difference]: Without dead ends: 77179 [2022-07-11 23:57:25,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:57:25,235 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 130 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:25,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 888 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 286 Invalid, 1 Unknown, 100 Unchecked, 2.4s Time] [2022-07-11 23:57:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77179 states. [2022-07-11 23:57:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77179 to 58957. [2022-07-11 23:57:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58957 states, 58956 states have (on average 1.4610557025578397) internal successors, (86138), 58956 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58957 states to 58957 states and 86138 transitions. [2022-07-11 23:57:26,887 INFO L78 Accepts]: Start accepts. Automaton has 58957 states and 86138 transitions. Word has length 548 [2022-07-11 23:57:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:26,887 INFO L495 AbstractCegarLoop]: Abstraction has 58957 states and 86138 transitions. [2022-07-11 23:57:26,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58957 states and 86138 transitions. [2022-07-11 23:57:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2022-07-11 23:57:26,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:26,963 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:26,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:57:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:27,168 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1632805314, now seen corresponding path program 1 times [2022-07-11 23:57:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:27,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482616743] [2022-07-11 23:57:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:27,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1125 proven. 1526 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-11 23:57:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482616743] [2022-07-11 23:57:28,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482616743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556704902] [2022-07-11 23:57:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:28,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:57:28,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:57:28,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:57:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2484 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-11 23:57:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:57:30,391 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:57:30,392 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 [2022-07-11 23:57:30,501 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-11 23:57:30,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-07-11 23:57:30,554 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 [2022-07-11 23:57:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:30,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-11 23:57:30,653 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-11 23:57:30,653 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 2 case distinctions, treesize of input 41 treesize of output 60 [2022-07-11 23:57:30,665 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:57:30,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-07-11 23:57:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:31,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-07-11 23:57:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:31,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-07-11 23:57:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:31,253 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-11 23:57:31,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2022-07-11 23:57:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:31,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-11 23:57:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:31,350 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:57:31,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2022-07-11 23:57:31,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:31,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-11 23:57:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,091 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-11 23:57:32,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2022-07-11 23:57:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,139 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-11 23:57:32,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2022-07-11 23:57:32,191 INFO L356 Elim1Store]: treesize reduction 53, result has 48.5 percent of original size [2022-07-11 23:57:32,191 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 42 treesize of output 75 [2022-07-11 23:57:32,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 198 [2022-07-11 23:57:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:32,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 198 [2022-07-11 23:57:32,872 INFO L356 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2022-07-11 23:57:32,873 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 4 case distinctions, treesize of input 234 treesize of output 271 [2022-07-11 23:57:35,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 189 [2022-07-11 23:57:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 189 [2022-07-11 23:57:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,644 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:57:35,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 229 treesize of output 241 [2022-07-11 23:57:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 109 [2022-07-11 23:57:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 69 [2022-07-11 23:57:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,854 INFO L356 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2022-07-11 23:57:35,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 59 [2022-07-11 23:57:35,913 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-11 23:57:35,913 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 33 treesize of output 35 [2022-07-11 23:57:35,999 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:57:35,999 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 29 treesize of output 11 [2022-07-11 23:57:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1194 proven. 496 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-07-11 23:57:36,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:57:41,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:41,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 714 treesize of output 552 [2022-07-11 23:57:41,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:41,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:41,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 924 treesize of output 768 [2022-07-11 23:57:45,408 INFO L356 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2022-07-11 23:57:45,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 1 [2022-07-11 23:57:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1341 proven. 141 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2022-07-11 23:57:45,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556704902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:57:45,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:57:45,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 13] total 48 [2022-07-11 23:57:45,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892870019] [2022-07-11 23:57:45,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:57:45,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 23:57:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 23:57:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2000, Unknown=2, NotChecked=0, Total=2256 [2022-07-11 23:57:45,420 INFO L87 Difference]: Start difference. First operand 58957 states and 86138 transitions. Second operand has 48 states, 48 states have (on average 16.6875) internal successors, (801), 48 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:48,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:50,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:52,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:54,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:57,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:59,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:58:02,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:58:04,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []