./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.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 b320c505e975e60a8773fab452d31c385380f52ca8479f4ba88c3e2472a94a3a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 20:50:30,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:50:30,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:50:30,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:50:30,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:50:30,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:50:30,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:50:30,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:50:30,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:50:30,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:50:30,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:50:30,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:50:30,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:50:30,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:50:30,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:50:30,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:50:30,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:50:30,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:50:30,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:50:30,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:50:30,814 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:50:30,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:50:30,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:50:30,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:50:30,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:50:30,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:50:30,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:50:30,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:50:30,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:50:30,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:50:30,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:50:30,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:50:30,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:50:30,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:50:30,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:50:30,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:50:30,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:50:30,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:50:30,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:50:30,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:50:30,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:50:30,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:50:30,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 20:50:30,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:50:30,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:50:30,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:50:30,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:50:30,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:50:30,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:50:30,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:50:30,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:50:30,861 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:50:30,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:50:30,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:50:30,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 20:50:30,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:50:30,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:50:30,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:50:30,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:50:30,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:50:30,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:50:30,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:50:30,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:50:30,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:50:30,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:50:30,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:50:30,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:50:30,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:50:30,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:50:30,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:50:30,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:50:30,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 20:50:30,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 20:50:30,866 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:50:30,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:50:30,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:50:30,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b320c505e975e60a8773fab452d31c385380f52ca8479f4ba88c3e2472a94a3a [2022-07-13 20:50:31,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:50:31,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:50:31,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:50:31,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:50:31,030 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:50:31,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c [2022-07-13 20:50:31,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc3b79e4/01c9faaa296b4e6a81eebd48631f7f51/FLAG55a514c3d [2022-07-13 20:50:31,591 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:50:31,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c [2022-07-13 20:50:31,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc3b79e4/01c9faaa296b4e6a81eebd48631f7f51/FLAG55a514c3d [2022-07-13 20:50:31,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc3b79e4/01c9faaa296b4e6a81eebd48631f7f51 [2022-07-13 20:50:31,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:50:31,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:50:31,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:50:31,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:50:31,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:50:31,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:50:31" (1/1) ... [2022-07-13 20:50:31,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f9dde5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:31, skipping insertion in model container [2022-07-13 20:50:31,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:50:31" (1/1) ... [2022-07-13 20:50:31,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:50:31,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:50:32,168 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c[8712,8725] [2022-07-13 20:50:32,202 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c[16460,16473] [2022-07-13 20:50:32,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:50:32,684 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:50:32,719 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c[8712,8725] [2022-07-13 20:50:32,725 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c[16460,16473] [2022-07-13 20:50:32,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:50:32,994 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:50:32,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32 WrapperNode [2022-07-13 20:50:32,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:50:32,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:50:32,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:50:32,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:50:33,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,265 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5031 [2022-07-13 20:50:33,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:50:33,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:50:33,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:50:33,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:50:33,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:50:33,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:50:33,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:50:33,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:50:33,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (1/1) ... [2022-07-13 20:50:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:50:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:50:33,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 20:50:33,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 20:50:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:50:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 20:50:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:50:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:50:33,762 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:50:33,764 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:50:36,512 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:50:36,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:50:36,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 20:50:36,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:50:36 BoogieIcfgContainer [2022-07-13 20:50:36,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:50:36,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:50:36,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:50:36,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:50:36,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:50:31" (1/3) ... [2022-07-13 20:50:36,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ce638d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:50:36, skipping insertion in model container [2022-07-13 20:50:36,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:50:32" (2/3) ... [2022-07-13 20:50:36,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ce638d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:50:36, skipping insertion in model container [2022-07-13 20:50:36,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:50:36" (3/3) ... [2022-07-13 20:50:36,537 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c [2022-07-13 20:50:36,547 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:50:36,547 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:50:36,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:50:36,604 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@5f8f4142, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e095fe8 [2022-07-13 20:50:36,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:50:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 20:50:36,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:36,622 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] [2022-07-13 20:50:36,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2022-07-13 20:50:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74710358] [2022-07-13 20:50:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:36,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74710358] [2022-07-13 20:50:36,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74710358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:36,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:36,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 20:50:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292884786] [2022-07-13 20:50:36,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 20:50:36,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 20:50:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 20:50:36,803 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:36,862 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2022-07-13 20:50:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 20:50:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 20:50:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:36,876 INFO L225 Difference]: With dead ends: 1759 [2022-07-13 20:50:36,877 INFO L226 Difference]: Without dead ends: 829 [2022-07-13 20:50:36,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 20:50:36,883 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:36,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-13 20:50:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-13 20:50:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2022-07-13 20:50:36,942 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2022-07-13 20:50:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:36,942 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2022-07-13 20:50:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2022-07-13 20:50:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 20:50:36,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:36,944 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] [2022-07-13 20:50:36,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 20:50:36,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2022-07-13 20:50:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:36,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223506670] [2022-07-13 20:50:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:36,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:37,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:37,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223506670] [2022-07-13 20:50:37,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223506670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:37,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:37,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:50:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138264847] [2022-07-13 20:50:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:37,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:50:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:50:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:50:37,032 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:37,203 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2022-07-13 20:50:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:50:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 20:50:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:37,207 INFO L225 Difference]: With dead ends: 879 [2022-07-13 20:50:37,208 INFO L226 Difference]: Without dead ends: 829 [2022-07-13 20:50:37,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:50:37,209 INFO L413 NwaCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:37,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:50:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-13 20:50:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-13 20:50:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2022-07-13 20:50:37,236 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2022-07-13 20:50:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:37,236 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2022-07-13 20:50:37,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2022-07-13 20:50:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 20:50:37,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:37,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:37,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 20:50:37,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2022-07-13 20:50:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:37,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621013536] [2022-07-13 20:50:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:37,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:37,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621013536] [2022-07-13 20:50:37,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621013536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:37,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:37,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:50:37,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174304725] [2022-07-13 20:50:37,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:37,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:50:37,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:50:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:50:37,332 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:37,448 INFO L93 Difference]: Finished difference Result 1197 states and 2116 transitions. [2022-07-13 20:50:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 20:50:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-13 20:50:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:37,453 INFO L225 Difference]: With dead ends: 1197 [2022-07-13 20:50:37,453 INFO L226 Difference]: Without dead ends: 1151 [2022-07-13 20:50:37,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 20:50:37,455 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:50:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-07-13 20:50:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 873. [2022-07-13 20:50:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 1.8473019517795637) internal successors, (1609), 872 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1609 transitions. [2022-07-13 20:50:37,473 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1609 transitions. Word has length 52 [2022-07-13 20:50:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1609 transitions. [2022-07-13 20:50:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1609 transitions. [2022-07-13 20:50:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 20:50:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:37,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:37,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 20:50:37,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2022-07-13 20:50:37,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:37,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074116282] [2022-07-13 20:50:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:37,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:37,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074116282] [2022-07-13 20:50:37,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074116282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:37,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:37,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936305683] [2022-07-13 20:50:37,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:37,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:37,558 INFO L87 Difference]: Start difference. First operand 873 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:37,586 INFO L93 Difference]: Finished difference Result 1042 states and 1872 transitions. [2022-07-13 20:50:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 20:50:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:37,590 INFO L225 Difference]: With dead ends: 1042 [2022-07-13 20:50:37,590 INFO L226 Difference]: Without dead ends: 952 [2022-07-13 20:50:37,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:37,598 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:37,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-07-13 20:50:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 948. [2022-07-13 20:50:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8213530655391121) internal successors, (1723), 947 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1723 transitions. [2022-07-13 20:50:37,622 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1723 transitions. Word has length 54 [2022-07-13 20:50:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:37,623 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1723 transitions. [2022-07-13 20:50:37,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1723 transitions. [2022-07-13 20:50:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 20:50:37,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:37,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 20:50:37,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2022-07-13 20:50:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:37,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833309123] [2022-07-13 20:50:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833309123] [2022-07-13 20:50:37,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833309123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:37,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:37,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:50:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747742530] [2022-07-13 20:50:37,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:37,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:50:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:50:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:50:37,739 INFO L87 Difference]: Start difference. First operand 948 states and 1723 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:37,826 INFO L93 Difference]: Finished difference Result 1115 states and 1979 transitions. [2022-07-13 20:50:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:50:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 20:50:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:37,830 INFO L225 Difference]: With dead ends: 1115 [2022-07-13 20:50:37,830 INFO L226 Difference]: Without dead ends: 950 [2022-07-13 20:50:37,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:50:37,834 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 6048 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6048 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:37,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6048 Valid, 1744 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-07-13 20:50:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 948. [2022-07-13 20:50:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8192389006342495) internal successors, (1721), 947 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1721 transitions. [2022-07-13 20:50:37,854 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1721 transitions. Word has length 54 [2022-07-13 20:50:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:37,856 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1721 transitions. [2022-07-13 20:50:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1721 transitions. [2022-07-13 20:50:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 20:50:37,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:37,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:37,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 20:50:37,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2022-07-13 20:50:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144432217] [2022-07-13 20:50:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144432217] [2022-07-13 20:50:37,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144432217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:37,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:37,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:37,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502769964] [2022-07-13 20:50:37,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:37,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:37,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:37,922 INFO L87 Difference]: Start difference. First operand 948 states and 1721 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:37,948 INFO L93 Difference]: Finished difference Result 1254 states and 2187 transitions. [2022-07-13 20:50:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:37,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 20:50:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:37,954 INFO L225 Difference]: With dead ends: 1254 [2022-07-13 20:50:37,954 INFO L226 Difference]: Without dead ends: 1089 [2022-07-13 20:50:37,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:37,956 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:37,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-13 20:50:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2022-07-13 20:50:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1085 states have (on average 1.7778801843317973) internal successors, (1929), 1086 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1929 transitions. [2022-07-13 20:50:37,983 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1929 transitions. Word has length 54 [2022-07-13 20:50:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:37,983 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1929 transitions. [2022-07-13 20:50:37,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1929 transitions. [2022-07-13 20:50:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 20:50:37,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:37,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:37,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 20:50:37,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2022-07-13 20:50:37,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:37,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285719200] [2022-07-13 20:50:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:37,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:38,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:38,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285719200] [2022-07-13 20:50:38,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285719200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:38,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:38,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686008805] [2022-07-13 20:50:38,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:38,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:38,026 INFO L87 Difference]: Start difference. First operand 1087 states and 1929 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:38,058 INFO L93 Difference]: Finished difference Result 1647 states and 2771 transitions. [2022-07-13 20:50:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:38,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 20:50:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:38,063 INFO L225 Difference]: With dead ends: 1647 [2022-07-13 20:50:38,063 INFO L226 Difference]: Without dead ends: 1343 [2022-07-13 20:50:38,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:38,066 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:38,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-07-13 20:50:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1341. [2022-07-13 20:50:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1339 states have (on average 1.7184466019417475) internal successors, (2301), 1340 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2301 transitions. [2022-07-13 20:50:38,101 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2301 transitions. Word has length 54 [2022-07-13 20:50:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:38,101 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2301 transitions. [2022-07-13 20:50:38,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2301 transitions. [2022-07-13 20:50:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 20:50:38,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:38,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 20:50:38,103 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:38,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2022-07-13 20:50:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:38,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379762985] [2022-07-13 20:50:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379762985] [2022-07-13 20:50:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379762985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:38,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:38,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164479697] [2022-07-13 20:50:38,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:38,142 INFO L87 Difference]: Start difference. First operand 1341 states and 2301 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:38,226 INFO L93 Difference]: Finished difference Result 2361 states and 3807 transitions. [2022-07-13 20:50:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:38,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 20:50:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:38,232 INFO L225 Difference]: With dead ends: 2361 [2022-07-13 20:50:38,232 INFO L226 Difference]: Without dead ends: 1803 [2022-07-13 20:50:38,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:38,233 INFO L413 NwaCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:38,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-07-13 20:50:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1801. [2022-07-13 20:50:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1799 states have (on average 1.6436909394107837) internal successors, (2957), 1800 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2957 transitions. [2022-07-13 20:50:38,280 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2957 transitions. Word has length 54 [2022-07-13 20:50:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:38,280 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2957 transitions. [2022-07-13 20:50:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2957 transitions. [2022-07-13 20:50:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 20:50:38,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:38,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:38,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 20:50:38,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2022-07-13 20:50:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:38,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745127251] [2022-07-13 20:50:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:38,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745127251] [2022-07-13 20:50:38,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745127251] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:38,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 20:50:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783752353] [2022-07-13 20:50:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 20:50:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 20:50:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:50:38,334 INFO L87 Difference]: Start difference. First operand 1801 states and 2957 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:38,480 INFO L93 Difference]: Finished difference Result 2571 states and 4058 transitions. [2022-07-13 20:50:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 20:50:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-13 20:50:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:38,488 INFO L225 Difference]: With dead ends: 2571 [2022-07-13 20:50:38,488 INFO L226 Difference]: Without dead ends: 2569 [2022-07-13 20:50:38,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-13 20:50:38,490 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 498 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 10579 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:38,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 10579 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-07-13 20:50:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1849. [2022-07-13 20:50:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1847 states have (on average 1.6226312939902545) internal successors, (2997), 1848 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2997 transitions. [2022-07-13 20:50:38,556 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2997 transitions. Word has length 55 [2022-07-13 20:50:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:38,556 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2997 transitions. [2022-07-13 20:50:38,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2997 transitions. [2022-07-13 20:50:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 20:50:38,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:38,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:38,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 20:50:38,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:38,558 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2022-07-13 20:50:38,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:38,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280051221] [2022-07-13 20:50:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:38,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:38,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280051221] [2022-07-13 20:50:38,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280051221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:38,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:38,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830160548] [2022-07-13 20:50:38,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:38,579 INFO L87 Difference]: Start difference. First operand 1849 states and 2997 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:38,657 INFO L93 Difference]: Finished difference Result 2944 states and 4587 transitions. [2022-07-13 20:50:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-13 20:50:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:38,665 INFO L225 Difference]: With dead ends: 2944 [2022-07-13 20:50:38,665 INFO L226 Difference]: Without dead ends: 2333 [2022-07-13 20:50:38,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:38,666 INFO L413 NwaCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:38,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-07-13 20:50:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2022-07-13 20:50:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2329 states have (on average 1.5762129669386002) internal successors, (3671), 2330 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3671 transitions. [2022-07-13 20:50:38,787 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3671 transitions. Word has length 56 [2022-07-13 20:50:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:38,787 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 3671 transitions. [2022-07-13 20:50:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3671 transitions. [2022-07-13 20:50:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 20:50:38,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:38,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:38,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 20:50:38,788 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1392228915, now seen corresponding path program 1 times [2022-07-13 20:50:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316699557] [2022-07-13 20:50:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:38,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:38,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316699557] [2022-07-13 20:50:38,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316699557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:38,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:38,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:38,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749406711] [2022-07-13 20:50:38,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:38,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 20:50:38,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 20:50:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 20:50:38,831 INFO L87 Difference]: Start difference. First operand 2331 states and 3671 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:43,849 INFO L93 Difference]: Finished difference Result 4586 states and 7980 transitions. [2022-07-13 20:50:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 20:50:43,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 20:50:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:43,861 INFO L225 Difference]: With dead ends: 4586 [2022-07-13 20:50:43,861 INFO L226 Difference]: Without dead ends: 3833 [2022-07-13 20:50:43,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:50:43,863 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 2373 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:43,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2373 Valid, 794 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-13 20:50:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2022-07-13 20:50:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3833. [2022-07-13 20:50:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3831 states have (on average 1.5100495954058992) internal successors, (5785), 3832 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5785 transitions. [2022-07-13 20:50:44,003 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5785 transitions. Word has length 67 [2022-07-13 20:50:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:44,003 INFO L495 AbstractCegarLoop]: Abstraction has 3833 states and 5785 transitions. [2022-07-13 20:50:44,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5785 transitions. [2022-07-13 20:50:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 20:50:44,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:44,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:44,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 20:50:44,009 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2022-07-13 20:50:44,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:44,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152579535] [2022-07-13 20:50:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:44,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 20:50:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152579535] [2022-07-13 20:50:44,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152579535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:44,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:44,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:50:44,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578084779] [2022-07-13 20:50:44,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:44,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:50:44,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:44,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:50:44,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:50:44,065 INFO L87 Difference]: Start difference. First operand 3833 states and 5785 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:44,465 INFO L93 Difference]: Finished difference Result 10339 states and 15026 transitions. [2022-07-13 20:50:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:50:44,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-07-13 20:50:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:44,493 INFO L225 Difference]: With dead ends: 10339 [2022-07-13 20:50:44,494 INFO L226 Difference]: Without dead ends: 8793 [2022-07-13 20:50:44,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:50:44,499 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4794 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:44,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4794 Valid, 3360 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2022-07-13 20:50:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 5377. [2022-07-13 20:50:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5375 states have (on average 1.4811162790697674) internal successors, (7961), 5376 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7961 transitions. [2022-07-13 20:50:44,726 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7961 transitions. Word has length 79 [2022-07-13 20:50:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:44,726 INFO L495 AbstractCegarLoop]: Abstraction has 5377 states and 7961 transitions. [2022-07-13 20:50:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7961 transitions. [2022-07-13 20:50:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 20:50:44,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:44,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:44,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 20:50:44,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2022-07-13 20:50:44,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623143294] [2022-07-13 20:50:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:44,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 20:50:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:44,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623143294] [2022-07-13 20:50:44,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623143294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:44,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:50:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603189765] [2022-07-13 20:50:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:50:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:50:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:50:44,782 INFO L87 Difference]: Start difference. First operand 5377 states and 7961 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:45,201 INFO L93 Difference]: Finished difference Result 11883 states and 17202 transitions. [2022-07-13 20:50:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:50:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-07-13 20:50:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:45,215 INFO L225 Difference]: With dead ends: 11883 [2022-07-13 20:50:45,215 INFO L226 Difference]: Without dead ends: 10337 [2022-07-13 20:50:45,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:50:45,219 INFO L413 NwaCegarLoop]: 1603 mSDtfsCounter, 4743 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4743 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:45,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4743 Valid, 3402 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10337 states. [2022-07-13 20:50:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10337 to 7697. [2022-07-13 20:50:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7695 states have (on average 1.456140350877193) internal successors, (11205), 7696 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 11205 transitions. [2022-07-13 20:50:45,541 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 11205 transitions. Word has length 79 [2022-07-13 20:50:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:45,541 INFO L495 AbstractCegarLoop]: Abstraction has 7697 states and 11205 transitions. [2022-07-13 20:50:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 11205 transitions. [2022-07-13 20:50:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 20:50:45,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:45,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 20:50:45,545 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2022-07-13 20:50:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:45,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126878900] [2022-07-13 20:50:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 20:50:45,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126878900] [2022-07-13 20:50:45,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126878900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:45,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:45,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:50:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073984399] [2022-07-13 20:50:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:45,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:50:45,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:50:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:50:45,591 INFO L87 Difference]: Start difference. First operand 7697 states and 11205 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:46,110 INFO L93 Difference]: Finished difference Result 13427 states and 19378 transitions. [2022-07-13 20:50:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:50:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-13 20:50:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:46,128 INFO L225 Difference]: With dead ends: 13427 [2022-07-13 20:50:46,128 INFO L226 Difference]: Without dead ends: 11881 [2022-07-13 20:50:46,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:50:46,134 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4774 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4774 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:46,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4774 Valid, 3394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2022-07-13 20:50:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 9241. [2022-07-13 20:50:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.4483169174153048) internal successors, (13381), 9240 states have internal predecessors, (13381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13381 transitions. [2022-07-13 20:50:46,652 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13381 transitions. Word has length 79 [2022-07-13 20:50:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:46,653 INFO L495 AbstractCegarLoop]: Abstraction has 9241 states and 13381 transitions. [2022-07-13 20:50:46,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13381 transitions. [2022-07-13 20:50:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 20:50:46,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:46,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:46,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 20:50:46,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2022-07-13 20:50:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362156451] [2022-07-13 20:50:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:46,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:46,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362156451] [2022-07-13 20:50:46,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362156451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:46,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:46,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:46,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993599544] [2022-07-13 20:50:46,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:46,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:46,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:46,683 INFO L87 Difference]: Start difference. First operand 9241 states and 13381 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:46,951 INFO L93 Difference]: Finished difference Result 14167 states and 20398 transitions. [2022-07-13 20:50:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-13 20:50:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:46,960 INFO L225 Difference]: With dead ends: 14167 [2022-07-13 20:50:46,960 INFO L226 Difference]: Without dead ends: 7213 [2022-07-13 20:50:46,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:46,967 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:46,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2022-07-13 20:50:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 7211. [2022-07-13 20:50:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7209 states have (on average 1.4602580108198087) internal successors, (10527), 7210 states have internal predecessors, (10527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 10527 transitions. [2022-07-13 20:50:47,285 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 10527 transitions. Word has length 81 [2022-07-13 20:50:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:47,285 INFO L495 AbstractCegarLoop]: Abstraction has 7211 states and 10527 transitions. [2022-07-13 20:50:47,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 10527 transitions. [2022-07-13 20:50:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 20:50:47,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:47,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 20:50:47,288 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2022-07-13 20:50:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:47,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829900244] [2022-07-13 20:50:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:50:47,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:47,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829900244] [2022-07-13 20:50:47,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829900244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:47,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:47,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:50:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469820345] [2022-07-13 20:50:47,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:47,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:50:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:50:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:50:47,340 INFO L87 Difference]: Start difference. First operand 7211 states and 10527 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:47,821 INFO L93 Difference]: Finished difference Result 11573 states and 16740 transitions. [2022-07-13 20:50:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:50:47,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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 81 [2022-07-13 20:50:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:47,834 INFO L225 Difference]: With dead ends: 11573 [2022-07-13 20:50:47,834 INFO L226 Difference]: Without dead ends: 10483 [2022-07-13 20:50:47,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:50:47,838 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 4760 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4760 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:47,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4760 Valid, 3379 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2022-07-13 20:50:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8299. [2022-07-13 20:50:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8299 states, 8297 states have (on average 1.4538989996384235) internal successors, (12063), 8298 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8299 states to 8299 states and 12063 transitions. [2022-07-13 20:50:48,213 INFO L78 Accepts]: Start accepts. Automaton has 8299 states and 12063 transitions. Word has length 81 [2022-07-13 20:50:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:48,213 INFO L495 AbstractCegarLoop]: Abstraction has 8299 states and 12063 transitions. [2022-07-13 20:50:48,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8299 states and 12063 transitions. [2022-07-13 20:50:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 20:50:48,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:48,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:48,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 20:50:48,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2022-07-13 20:50:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236345329] [2022-07-13 20:50:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:48,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236345329] [2022-07-13 20:50:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236345329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:48,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:48,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556835173] [2022-07-13 20:50:48,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:48,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:48,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:48,247 INFO L87 Difference]: Start difference. First operand 8299 states and 12063 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:48,453 INFO L93 Difference]: Finished difference Result 11295 states and 16289 transitions. [2022-07-13 20:50:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-13 20:50:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:48,459 INFO L225 Difference]: With dead ends: 11295 [2022-07-13 20:50:48,459 INFO L226 Difference]: Without dead ends: 5309 [2022-07-13 20:50:48,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:48,464 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:48,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2022-07-13 20:50:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 5307. [2022-07-13 20:50:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5305 states have (on average 1.469368520263902) internal successors, (7795), 5306 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 7795 transitions. [2022-07-13 20:50:48,657 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 7795 transitions. Word has length 82 [2022-07-13 20:50:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:48,657 INFO L495 AbstractCegarLoop]: Abstraction has 5307 states and 7795 transitions. [2022-07-13 20:50:48,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 7795 transitions. [2022-07-13 20:50:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 20:50:48,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:48,659 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 20:50:48,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 20:50:48,659 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2022-07-13 20:50:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:48,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917130360] [2022-07-13 20:50:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:48,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:48,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917130360] [2022-07-13 20:50:48,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917130360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:48,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:48,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:48,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688800845] [2022-07-13 20:50:48,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:48,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:48,697 INFO L87 Difference]: Start difference. First operand 5307 states and 7795 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:48,801 INFO L93 Difference]: Finished difference Result 6807 states and 9887 transitions. [2022-07-13 20:50:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-13 20:50:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:48,806 INFO L225 Difference]: With dead ends: 6807 [2022-07-13 20:50:48,806 INFO L226 Difference]: Without dead ends: 3813 [2022-07-13 20:50:48,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:48,809 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:48,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-07-13 20:50:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3811. [2022-07-13 20:50:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3809 states have (on average 1.4919926489892361) internal successors, (5683), 3810 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 5683 transitions. [2022-07-13 20:50:48,923 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 5683 transitions. Word has length 82 [2022-07-13 20:50:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:48,923 INFO L495 AbstractCegarLoop]: Abstraction has 3811 states and 5683 transitions. [2022-07-13 20:50:48,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 5683 transitions. [2022-07-13 20:50:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 20:50:48,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:48,924 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 20:50:48,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 20:50:48,924 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2022-07-13 20:50:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218466140] [2022-07-13 20:50:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:48,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218466140] [2022-07-13 20:50:48,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218466140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:50:48,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:50:48,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:50:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393205551] [2022-07-13 20:50:48,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:50:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:50:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:50:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:48,948 INFO L87 Difference]: Start difference. First operand 3811 states and 5683 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:49,012 INFO L93 Difference]: Finished difference Result 4563 states and 6719 transitions. [2022-07-13 20:50:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:50:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-13 20:50:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:49,015 INFO L225 Difference]: With dead ends: 4563 [2022-07-13 20:50:49,015 INFO L226 Difference]: Without dead ends: 3065 [2022-07-13 20:50:49,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:50:49,017 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:49,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:50:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-07-13 20:50:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 3063. [2022-07-13 20:50:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3061 states have (on average 1.5151911140150278) internal successors, (4638), 3062 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4638 transitions. [2022-07-13 20:50:49,111 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4638 transitions. Word has length 82 [2022-07-13 20:50:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:49,111 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4638 transitions. [2022-07-13 20:50:49,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4638 transitions. [2022-07-13 20:50:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 20:50:49,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:49,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:49,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 20:50:49,112 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2022-07-13 20:50:49,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042622126] [2022-07-13 20:50:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:49,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:49,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042622126] [2022-07-13 20:50:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042622126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:50:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788447081] [2022-07-13 20:50:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:49,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:50:49,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:50:49,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:50:49,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 20:50:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 20:50:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:50:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:50:49,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:50:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:50:49,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788447081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:50:49,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:50:49,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-13 20:50:49,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510385254] [2022-07-13 20:50:49,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:50:49,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:50:49,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:50:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-13 20:50:49,721 INFO L87 Difference]: Start difference. First operand 3063 states and 4638 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:52,507 INFO L93 Difference]: Finished difference Result 12222 states and 16849 transitions. [2022-07-13 20:50:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-13 20:50:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-13 20:50:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:52,517 INFO L225 Difference]: With dead ends: 12222 [2022-07-13 20:50:52,518 INFO L226 Difference]: Without dead ends: 11472 [2022-07-13 20:50:52,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2022-07-13 20:50:52,523 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 19818 mSDsluCounter, 5136 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19818 SdHoareTripleChecker+Valid, 6683 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:52,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19818 Valid, 6683 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 20:50:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2022-07-13 20:50:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 8732. [2022-07-13 20:50:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8732 states, 8730 states have (on average 1.3626575028636885) internal successors, (11896), 8731 states have internal predecessors, (11896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8732 states to 8732 states and 11896 transitions. [2022-07-13 20:50:53,037 INFO L78 Accepts]: Start accepts. Automaton has 8732 states and 11896 transitions. Word has length 82 [2022-07-13 20:50:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:53,037 INFO L495 AbstractCegarLoop]: Abstraction has 8732 states and 11896 transitions. [2022-07-13 20:50:53,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8732 states and 11896 transitions. [2022-07-13 20:50:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 20:50:53,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:53,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:53,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 20:50:53,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:50:53,254 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2022-07-13 20:50:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:53,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570492506] [2022-07-13 20:50:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:53,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570492506] [2022-07-13 20:50:53,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570492506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:50:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806093040] [2022-07-13 20:50:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:53,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:50:53,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:50:53,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:50:53,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 20:50:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 20:50:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:50:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:53,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:50:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:54,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806093040] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:50:54,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:50:54,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-13 20:50:54,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737452622] [2022-07-13 20:50:54,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:50:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 20:50:54,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:50:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 20:50:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-13 20:50:54,362 INFO L87 Difference]: Start difference. First operand 8732 states and 11896 transitions. Second operand has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:50:56,988 INFO L93 Difference]: Finished difference Result 31590 states and 41442 transitions. [2022-07-13 20:50:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 20:50:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-13 20:50:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:50:57,018 INFO L225 Difference]: With dead ends: 31590 [2022-07-13 20:50:57,018 INFO L226 Difference]: Without dead ends: 25463 [2022-07-13 20:50:57,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-07-13 20:50:57,028 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 15465 mSDsluCounter, 5278 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15465 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 20:50:57,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15465 Valid, 6812 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 20:50:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25463 states. [2022-07-13 20:50:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25463 to 16639. [2022-07-13 20:50:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16639 states, 16637 states have (on average 1.3078680050489873) internal successors, (21759), 16638 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16639 states to 16639 states and 21759 transitions. [2022-07-13 20:50:58,418 INFO L78 Accepts]: Start accepts. Automaton has 16639 states and 21759 transitions. Word has length 83 [2022-07-13 20:50:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:50:58,419 INFO L495 AbstractCegarLoop]: Abstraction has 16639 states and 21759 transitions. [2022-07-13 20:50:58,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:50:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16639 states and 21759 transitions. [2022-07-13 20:50:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 20:50:58,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:50:58,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:50:58,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 20:50:58,629 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,SelfDestructingSolverStorable20 [2022-07-13 20:50:58,629 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:50:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:50:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1875749690, now seen corresponding path program 1 times [2022-07-13 20:50:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:50:58,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140228858] [2022-07-13 20:50:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:50:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:58,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:50:58,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140228858] [2022-07-13 20:50:58,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140228858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:50:58,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123626495] [2022-07-13 20:50:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:50:58,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:50:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:50:58,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:50:58,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 20:50:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:50:58,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 20:50:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:50:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:50:59,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:51:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:51:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123626495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:51:00,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:51:00,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-13 20:51:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395763387] [2022-07-13 20:51:00,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:51:00,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 20:51:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:51:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 20:51:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-13 20:51:00,275 INFO L87 Difference]: Start difference. First operand 16639 states and 21759 transitions. Second operand has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:51:14,574 INFO L93 Difference]: Finished difference Result 100795 states and 129617 transitions. [2022-07-13 20:51:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-13 20:51:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-13 20:51:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:51:14,699 INFO L225 Difference]: With dead ends: 100795 [2022-07-13 20:51:14,700 INFO L226 Difference]: Without dead ends: 87653 [2022-07-13 20:51:14,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3841 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2150, Invalid=9622, Unknown=0, NotChecked=0, Total=11772 [2022-07-13 20:51:14,730 INFO L413 NwaCegarLoop]: 1608 mSDtfsCounter, 14094 mSDsluCounter, 16450 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14094 SdHoareTripleChecker+Valid, 18058 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 20:51:14,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14094 Valid, 18058 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 20:51:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87653 states. [2022-07-13 20:51:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87653 to 41247. [2022-07-13 20:51:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41247 states, 41245 states have (on average 1.2682264516911141) internal successors, (52308), 41246 states have internal predecessors, (52308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41247 states to 41247 states and 52308 transitions. [2022-07-13 20:51:20,230 INFO L78 Accepts]: Start accepts. Automaton has 41247 states and 52308 transitions. Word has length 83 [2022-07-13 20:51:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:51:20,230 INFO L495 AbstractCegarLoop]: Abstraction has 41247 states and 52308 transitions. [2022-07-13 20:51:20,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 41247 states and 52308 transitions. [2022-07-13 20:51:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 20:51:20,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:51:20,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:51:20,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 20:51:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:51:20,450 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:51:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:51:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1855953112, now seen corresponding path program 1 times [2022-07-13 20:51:20,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:51:20,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115419127] [2022-07-13 20:51:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:51:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:51:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:51:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 20:51:20,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:51:20,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115419127] [2022-07-13 20:51:20,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115419127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:51:20,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:51:20,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:51:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992957512] [2022-07-13 20:51:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:51:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:51:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:51:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:51:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:51:20,498 INFO L87 Difference]: Start difference. First operand 41247 states and 52308 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:51:23,386 INFO L93 Difference]: Finished difference Result 63781 states and 80568 transitions. [2022-07-13 20:51:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:51:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 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 83 [2022-07-13 20:51:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:51:23,418 INFO L225 Difference]: With dead ends: 63781 [2022-07-13 20:51:23,418 INFO L226 Difference]: Without dead ends: 24930 [2022-07-13 20:51:23,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:51:23,443 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4552 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4552 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:51:23,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4552 Valid, 2995 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:51:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24930 states. [2022-07-13 20:51:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24930 to 24930. [2022-07-13 20:51:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24930 states, 24928 states have (on average 1.2607108472400514) internal successors, (31427), 24929 states have internal predecessors, (31427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24930 states to 24930 states and 31427 transitions. [2022-07-13 20:51:26,999 INFO L78 Accepts]: Start accepts. Automaton has 24930 states and 31427 transitions. Word has length 83 [2022-07-13 20:51:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:51:26,999 INFO L495 AbstractCegarLoop]: Abstraction has 24930 states and 31427 transitions. [2022-07-13 20:51:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24930 states and 31427 transitions. [2022-07-13 20:51:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 20:51:27,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:51:27,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:51:27,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 20:51:27,001 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:51:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:51:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1741675261, now seen corresponding path program 1 times [2022-07-13 20:51:27,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:51:27,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922059432] [2022-07-13 20:51:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:51:27,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:51:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:51:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:51:27,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:51:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922059432] [2022-07-13 20:51:27,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922059432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:51:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689795009] [2022-07-13 20:51:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:51:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:51:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:51:27,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:51:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 20:51:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:51:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 20:51:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:51:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:51:27,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:51:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:51:28,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689795009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:51:28,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:51:28,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-13 20:51:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959574945] [2022-07-13 20:51:28,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:51:28,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 20:51:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:51:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 20:51:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-13 20:51:28,020 INFO L87 Difference]: Start difference. First operand 24930 states and 31427 transitions. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:51:40,924 INFO L93 Difference]: Finished difference Result 111475 states and 136783 transitions. [2022-07-13 20:51:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 20:51:40,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-13 20:51:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:51:41,048 INFO L225 Difference]: With dead ends: 111475 [2022-07-13 20:51:41,048 INFO L226 Difference]: Without dead ends: 92380 [2022-07-13 20:51:41,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 20:51:41,072 INFO L413 NwaCegarLoop]: 1532 mSDtfsCounter, 9414 mSDsluCounter, 4924 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9414 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 20:51:41,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9414 Valid, 6456 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 20:51:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92380 states. [2022-07-13 20:51:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92380 to 62510. [2022-07-13 20:51:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62510 states, 62508 states have (on average 1.232322262750368) internal successors, (77030), 62509 states have internal predecessors, (77030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62510 states to 62510 states and 77030 transitions. [2022-07-13 20:51:49,893 INFO L78 Accepts]: Start accepts. Automaton has 62510 states and 77030 transitions. Word has length 84 [2022-07-13 20:51:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:51:49,893 INFO L495 AbstractCegarLoop]: Abstraction has 62510 states and 77030 transitions. [2022-07-13 20:51:49,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 62510 states and 77030 transitions. [2022-07-13 20:51:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 20:51:49,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:51:49,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:51:49,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 20:51:50,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:51:50,105 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:51:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:51:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash -307712581, now seen corresponding path program 1 times [2022-07-13 20:51:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:51:50,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555386096] [2022-07-13 20:51:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:51:50,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:51:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:51:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 20:51:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:51:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555386096] [2022-07-13 20:51:50,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555386096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:51:50,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:51:50,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:51:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982894745] [2022-07-13 20:51:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:51:50,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:51:50,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:51:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:51:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:51:50,144 INFO L87 Difference]: Start difference. First operand 62510 states and 77030 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:51:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:51:56,836 INFO L93 Difference]: Finished difference Result 106522 states and 130852 transitions. [2022-07-13 20:51:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:51:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 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 84 [2022-07-13 20:51:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:51:56,895 INFO L225 Difference]: With dead ends: 106522 [2022-07-13 20:51:56,895 INFO L226 Difference]: Without dead ends: 46494 [2022-07-13 20:51:56,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:51:56,919 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4558 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:51:56,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4558 Valid, 2989 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:51:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46494 states. [2022-07-13 20:52:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46494 to 46494. [2022-07-13 20:52:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46494 states, 46492 states have (on average 1.2170911124494537) internal successors, (56585), 46493 states have internal predecessors, (56585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46494 states to 46494 states and 56585 transitions. [2022-07-13 20:52:03,665 INFO L78 Accepts]: Start accepts. Automaton has 46494 states and 56585 transitions. Word has length 84 [2022-07-13 20:52:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:52:03,665 INFO L495 AbstractCegarLoop]: Abstraction has 46494 states and 56585 transitions. [2022-07-13 20:52:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 46494 states and 56585 transitions. [2022-07-13 20:52:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 20:52:03,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:52:03,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:52:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 20:52:03,666 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:52:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:52:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1154652827, now seen corresponding path program 1 times [2022-07-13 20:52:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:52:03,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538585369] [2022-07-13 20:52:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:52:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:52:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:52:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 20:52:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:52:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538585369] [2022-07-13 20:52:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538585369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:52:03,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:52:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:52:03,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432993954] [2022-07-13 20:52:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:52:03,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:52:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:52:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:52:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:52:03,721 INFO L87 Difference]: Start difference. First operand 46494 states and 56585 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:52:09,028 INFO L93 Difference]: Finished difference Result 79624 states and 96570 transitions. [2022-07-13 20:52:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:52:09,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 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 84 [2022-07-13 20:52:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:52:09,072 INFO L225 Difference]: With dead ends: 79624 [2022-07-13 20:52:09,072 INFO L226 Difference]: Without dead ends: 35498 [2022-07-13 20:52:09,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:52:09,093 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4617 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4617 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:52:09,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4617 Valid, 2976 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:52:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35498 states. [2022-07-13 20:52:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35498 to 35498. [2022-07-13 20:52:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35498 states, 35496 states have (on average 1.2106152805949966) internal successors, (42972), 35497 states have internal predecessors, (42972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35498 states to 35498 states and 42972 transitions. [2022-07-13 20:52:14,542 INFO L78 Accepts]: Start accepts. Automaton has 35498 states and 42972 transitions. Word has length 84 [2022-07-13 20:52:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:52:14,542 INFO L495 AbstractCegarLoop]: Abstraction has 35498 states and 42972 transitions. [2022-07-13 20:52:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 35498 states and 42972 transitions. [2022-07-13 20:52:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 20:52:14,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:52:14,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:52:14,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 20:52:14,544 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:52:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:52:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -125329541, now seen corresponding path program 1 times [2022-07-13 20:52:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:52:14,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865972501] [2022-07-13 20:52:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:52:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:52:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:52:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 20:52:14,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:52:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865972501] [2022-07-13 20:52:14,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865972501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:52:14,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:52:14,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:52:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589396312] [2022-07-13 20:52:14,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:52:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:52:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:52:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:52:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:52:14,593 INFO L87 Difference]: Start difference. First operand 35498 states and 42972 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:52:18,723 INFO L93 Difference]: Finished difference Result 59818 states and 72277 transitions. [2022-07-13 20:52:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:52:18,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 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 84 [2022-07-13 20:52:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:52:18,757 INFO L225 Difference]: With dead ends: 59818 [2022-07-13 20:52:18,757 INFO L226 Difference]: Without dead ends: 26641 [2022-07-13 20:52:18,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 20:52:18,771 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4570 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4570 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:52:18,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4570 Valid, 2977 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:52:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26641 states. [2022-07-13 20:52:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26641 to 26641. [2022-07-13 20:52:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26641 states, 26639 states have (on average 1.2207665452907392) internal successors, (32520), 26640 states have internal predecessors, (32520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26641 states to 26641 states and 32520 transitions. [2022-07-13 20:52:22,894 INFO L78 Accepts]: Start accepts. Automaton has 26641 states and 32520 transitions. Word has length 84 [2022-07-13 20:52:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:52:22,894 INFO L495 AbstractCegarLoop]: Abstraction has 26641 states and 32520 transitions. [2022-07-13 20:52:22,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:52:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 26641 states and 32520 transitions. [2022-07-13 20:52:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-13 20:52:22,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:52:22,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:52:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 20:52:22,895 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:52:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:52:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -260780419, now seen corresponding path program 1 times [2022-07-13 20:52:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:52:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264071239] [2022-07-13 20:52:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:52:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:52:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:52:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:52:23,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:52:23,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264071239] [2022-07-13 20:52:23,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264071239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:52:23,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056634006] [2022-07-13 20:52:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:52:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:52:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:52:23,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:52:23,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 20:52:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:52:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 20:52:23,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:52:37,322 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 4852 DAG size of output: 4338 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)