./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label03.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 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 00:13:01,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 00:13:01,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 00:13:01,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 00:13:01,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 00:13:01,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 00:13:01,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 00:13:01,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 00:13:01,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 00:13:01,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 00:13:01,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 00:13:01,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 00:13:01,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 00:13:01,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 00:13:01,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 00:13:01,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 00:13:01,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 00:13:01,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 00:13:01,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 00:13:01,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 00:13:01,629 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 00:13:01,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 00:13:01,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 00:13:01,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 00:13:01,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 00:13:01,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 00:13:01,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 00:13:01,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 00:13:01,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 00:13:01,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 00:13:01,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 00:13:01,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 00:13:01,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 00:13:01,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 00:13:01,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 00:13:01,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 00:13:01,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 00:13:01,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 00:13:01,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 00:13:01,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 00:13:01,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 00:13:01,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 00:13:01,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 00:13:01,692 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 00:13:01,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 00:13:01,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 00:13:01,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 00:13:01,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 00:13:01,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 00:13:01,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 00:13:01,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 00:13:01,696 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 00:13:01,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 00:13:01,697 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 00:13:01,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 00:13:01,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 00:13:01,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 00:13:01,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 00:13:01,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 00:13:01,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 00:13:01,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 00:13:01,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 00:13:01,698 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 00:13:01,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 00:13:01,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 00:13:01,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 00:13:01,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 00:13:01,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 00:13:01,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 00:13:01,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 00:13:01,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 00:13:01,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 00:13:01,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 00:13:01,700 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 00:13:01,700 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 00:13:01,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 00:13:01,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 [2022-07-21 00:13:01,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 00:13:01,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 00:13:01,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 00:13:01,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 00:13:01,982 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 00:13:01,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2022-07-21 00:13:02,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf0a56da2/21c2641cda624d60a49d5786940610ea/FLAGf42879047 [2022-07-21 00:13:02,528 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 00:13:02,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2022-07-21 00:13:02,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf0a56da2/21c2641cda624d60a49d5786940610ea/FLAGf42879047 [2022-07-21 00:13:03,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf0a56da2/21c2641cda624d60a49d5786940610ea [2022-07-21 00:13:03,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 00:13:03,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 00:13:03,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 00:13:03,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 00:13:03,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 00:13:03,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:03,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f02aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03, skipping insertion in model container [2022-07-21 00:13:03,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:03,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 00:13:03,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 00:13:03,374 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/eca-rers2012/Problem17_label03.c[7281,7294] [2022-07-21 00:13:03,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 00:13:03,706 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 00:13:03,732 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/eca-rers2012/Problem17_label03.c[7281,7294] [2022-07-21 00:13:03,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 00:13:03,953 INFO L208 MainTranslator]: Completed translation [2022-07-21 00:13:03,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03 WrapperNode [2022-07-21 00:13:03,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 00:13:03,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 00:13:03,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 00:13:03,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 00:13:03,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:03,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,265 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-21 00:13:04,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 00:13:04,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 00:13:04,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 00:13:04,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 00:13:04,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 00:13:04,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 00:13:04,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 00:13:04,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 00:13:04,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (1/1) ... [2022-07-21 00:13:04,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 00:13:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 00:13:04,523 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) [2022-07-21 00:13:04,562 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 [2022-07-21 00:13:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 00:13:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 00:13:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 00:13:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 00:13:04,629 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 00:13:04,630 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 00:13:07,068 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 00:13:07,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 00:13:07,078 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 00:13:07,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:13:07 BoogieIcfgContainer [2022-07-21 00:13:07,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 00:13:07,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 00:13:07,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 00:13:07,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 00:13:07,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:13:03" (1/3) ... [2022-07-21 00:13:07,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:13:07, skipping insertion in model container [2022-07-21 00:13:07,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:13:03" (2/3) ... [2022-07-21 00:13:07,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:13:07, skipping insertion in model container [2022-07-21 00:13:07,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:13:07" (3/3) ... [2022-07-21 00:13:07,086 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2022-07-21 00:13:07,099 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 00:13:07,099 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 00:13:07,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 00:13:07,162 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@7ed6eea4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a9f7e45 [2022-07-21 00:13:07,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 00:13:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 00:13:07,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:07,179 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] [2022-07-21 00:13:07,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2022-07-21 00:13:07,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68831897] [2022-07-21 00:13:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 00:13:07,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68831897] [2022-07-21 00:13:07,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68831897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:07,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:07,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 00:13:07,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44528432] [2022-07-21 00:13:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:07,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:07,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:07,466 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:09,772 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-21 00:13:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-21 00:13:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:09,788 INFO L225 Difference]: With dead ends: 1644 [2022-07-21 00:13:09,788 INFO L226 Difference]: Without dead ends: 977 [2022-07-21 00:13:09,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:09,794 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 439 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:09,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-21 00:13:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-21 00:13:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-21 00:13:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-21 00:13:09,862 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 49 [2022-07-21 00:13:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:09,862 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-21 00:13:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-21 00:13:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 00:13:09,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:09,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 00:13:09,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash -172834846, now seen corresponding path program 1 times [2022-07-21 00:13:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:09,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309586897] [2022-07-21 00:13:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 00:13:09,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309586897] [2022-07-21 00:13:09,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309586897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:09,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:09,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 00:13:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251308581] [2022-07-21 00:13:09,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:09,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:09,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:09,996 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:11,920 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-07-21 00:13:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:11,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-07-21 00:13:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:11,926 INFO L225 Difference]: With dead ends: 2813 [2022-07-21 00:13:11,926 INFO L226 Difference]: Without dead ends: 1844 [2022-07-21 00:13:11,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:11,928 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:11,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-21 00:13:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-21 00:13:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-07-21 00:13:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-07-21 00:13:11,962 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 116 [2022-07-21 00:13:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-07-21 00:13:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-07-21 00:13:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 00:13:11,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:11,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:11,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 00:13:11,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash -807304596, now seen corresponding path program 1 times [2022-07-21 00:13:11,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291017065] [2022-07-21 00:13:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 00:13:12,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:12,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291017065] [2022-07-21 00:13:12,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291017065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:12,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:12,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:12,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464850863] [2022-07-21 00:13:12,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:12,126 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:14,000 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2022-07-21 00:13:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:14,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-21 00:13:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:14,019 INFO L225 Difference]: With dead ends: 4552 [2022-07-21 00:13:14,019 INFO L226 Difference]: Without dead ends: 2713 [2022-07-21 00:13:14,021 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 [2022-07-21 00:13:14,022 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:14,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-21 00:13:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-07-21 00:13:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2022-07-21 00:13:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2022-07-21 00:13:14,061 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 119 [2022-07-21 00:13:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:14,062 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2022-07-21 00:13:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2022-07-21 00:13:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-21 00:13:14,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:14,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 00:13:14,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 182092692, now seen corresponding path program 1 times [2022-07-21 00:13:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:14,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701755893] [2022-07-21 00:13:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-21 00:13:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701755893] [2022-07-21 00:13:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701755893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:14,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:14,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 00:13:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587051697] [2022-07-21 00:13:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:14,237 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:15,926 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2022-07-21 00:13:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:15,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-07-21 00:13:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:15,938 INFO L225 Difference]: With dead ends: 7984 [2022-07-21 00:13:15,938 INFO L226 Difference]: Without dead ends: 4421 [2022-07-21 00:13:15,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:15,945 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:15,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 00:13:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-07-21 00:13:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2022-07-21 00:13:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2022-07-21 00:13:16,005 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 188 [2022-07-21 00:13:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:16,006 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2022-07-21 00:13:16,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2022-07-21 00:13:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-21 00:13:16,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:16,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-21 00:13:16,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 00:13:16,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1924874294, now seen corresponding path program 1 times [2022-07-21 00:13:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:16,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484829108] [2022-07-21 00:13:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 00:13:16,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:16,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484829108] [2022-07-21 00:13:16,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484829108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:16,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:16,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194205721] [2022-07-21 00:13:16,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:16,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:16,132 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:17,619 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2022-07-21 00:13:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:17,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2022-07-21 00:13:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:17,633 INFO L225 Difference]: With dead ends: 9273 [2022-07-21 00:13:17,633 INFO L226 Difference]: Without dead ends: 5704 [2022-07-21 00:13:17,636 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 [2022-07-21 00:13:17,637 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:17,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 00:13:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2022-07-21 00:13:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2022-07-21 00:13:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2022-07-21 00:13:17,707 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 201 [2022-07-21 00:13:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:17,709 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2022-07-21 00:13:17,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2022-07-21 00:13:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-21 00:13:17,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:17,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-21 00:13:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 00:13:17,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1110667493, now seen corresponding path program 1 times [2022-07-21 00:13:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:17,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480982414] [2022-07-21 00:13:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-21 00:13:17,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480982414] [2022-07-21 00:13:17,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480982414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:17,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:17,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393143717] [2022-07-21 00:13:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:17,799 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:19,348 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2022-07-21 00:13:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-07-21 00:13:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:19,375 INFO L225 Difference]: With dead ends: 14376 [2022-07-21 00:13:19,375 INFO L226 Difference]: Without dead ends: 8673 [2022-07-21 00:13:19,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:19,386 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 402 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:19,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 00:13:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2022-07-21 00:13:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2022-07-21 00:13:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2022-07-21 00:13:19,472 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 203 [2022-07-21 00:13:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:19,472 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2022-07-21 00:13:19,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2022-07-21 00:13:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-21 00:13:19,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:19,475 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:19,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 00:13:19,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -145584583, now seen corresponding path program 1 times [2022-07-21 00:13:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:19,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43062153] [2022-07-21 00:13:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-21 00:13:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43062153] [2022-07-21 00:13:19,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43062153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:19,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:19,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320528562] [2022-07-21 00:13:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:19,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:19,603 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:21,299 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2022-07-21 00:13:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-07-21 00:13:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:21,318 INFO L225 Difference]: With dead ends: 13935 [2022-07-21 00:13:21,318 INFO L226 Difference]: Without dead ends: 7832 [2022-07-21 00:13:21,324 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 [2022-07-21 00:13:21,324 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:21,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 00:13:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2022-07-21 00:13:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2022-07-21 00:13:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2022-07-21 00:13:21,426 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 281 [2022-07-21 00:13:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:21,427 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2022-07-21 00:13:21,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2022-07-21 00:13:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-21 00:13:21,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:21,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:21,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 00:13:21,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576314, now seen corresponding path program 1 times [2022-07-21 00:13:21,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:21,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759362196] [2022-07-21 00:13:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:21,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-21 00:13:21,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:21,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759362196] [2022-07-21 00:13:21,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759362196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:21,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:21,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:21,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248633914] [2022-07-21 00:13:21,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:21,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:21,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:21,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:21,524 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:23,058 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2022-07-21 00:13:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2022-07-21 00:13:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:23,080 INFO L225 Difference]: With dead ends: 19038 [2022-07-21 00:13:23,081 INFO L226 Difference]: Without dead ends: 11213 [2022-07-21 00:13:23,088 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 [2022-07-21 00:13:23,089 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:23,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 00:13:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2022-07-21 00:13:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2022-07-21 00:13:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2022-07-21 00:13:23,190 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 286 [2022-07-21 00:13:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:23,190 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2022-07-21 00:13:23,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2022-07-21 00:13:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-21 00:13:23,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:23,194 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:23,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 00:13:23,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:23,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:23,195 INFO L85 PathProgramCache]: Analyzing trace with hash -968764252, now seen corresponding path program 1 times [2022-07-21 00:13:23,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:23,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787693264] [2022-07-21 00:13:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-21 00:13:23,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787693264] [2022-07-21 00:13:23,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787693264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:23,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:23,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832980971] [2022-07-21 00:13:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:23,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:23,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:23,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:23,331 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:24,917 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2022-07-21 00:13:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-07-21 00:13:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:24,943 INFO L225 Difference]: With dead ends: 24567 [2022-07-21 00:13:24,943 INFO L226 Difference]: Without dead ends: 13774 [2022-07-21 00:13:24,953 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 [2022-07-21 00:13:24,953 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:24,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 00:13:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2022-07-21 00:13:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2022-07-21 00:13:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2022-07-21 00:13:25,081 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 304 [2022-07-21 00:13:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:25,081 INFO L495 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2022-07-21 00:13:25,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2022-07-21 00:13:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-07-21 00:13:25,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:25,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:25,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 00:13:25,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1120603921, now seen corresponding path program 1 times [2022-07-21 00:13:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:25,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331834338] [2022-07-21 00:13:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:25,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 293 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 00:13:25,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331834338] [2022-07-21 00:13:25,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331834338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 00:13:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424135143] [2022-07-21 00:13:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 00:13:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 00:13:25,236 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) [2022-07-21 00:13:25,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 00:13:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 00:13:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 00:13:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 00:13:25,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 00:13:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 00:13:26,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424135143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 00:13:26,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 00:13:26,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-21 00:13:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24602767] [2022-07-21 00:13:26,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 00:13:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 00:13:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 00:13:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-21 00:13:26,513 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:39,467 INFO L93 Difference]: Finished difference Result 72324 states and 82154 transitions. [2022-07-21 00:13:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 00:13:39,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2022-07-21 00:13:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:39,559 INFO L225 Difference]: With dead ends: 72324 [2022-07-21 00:13:39,559 INFO L226 Difference]: Without dead ends: 55574 [2022-07-21 00:13:39,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-07-21 00:13:39,576 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 12615 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 14182 mSolverCounterSat, 2714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12615 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 16896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2714 IncrementalHoareTripleChecker+Valid, 14182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:39,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12615 Valid, 584 Invalid, 16896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2714 Valid, 14182 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-07-21 00:13:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55574 states. [2022-07-21 00:13:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55574 to 45745. [2022-07-21 00:13:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45745 states, 45744 states have (on average 1.1340066456803077) internal successors, (51874), 45744 states have internal predecessors, (51874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45745 states to 45745 states and 51874 transitions. [2022-07-21 00:13:40,140 INFO L78 Accepts]: Start accepts. Automaton has 45745 states and 51874 transitions. Word has length 309 [2022-07-21 00:13:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:40,140 INFO L495 AbstractCegarLoop]: Abstraction has 45745 states and 51874 transitions. [2022-07-21 00:13:40,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45745 states and 51874 transitions. [2022-07-21 00:13:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-21 00:13:40,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:40,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:40,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 00:13:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 00:13:40,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1219629045, now seen corresponding path program 1 times [2022-07-21 00:13:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882224277] [2022-07-21 00:13:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:40,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-21 00:13:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882224277] [2022-07-21 00:13:40,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882224277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:40,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:40,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301492299] [2022-07-21 00:13:40,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:40,475 INFO L87 Difference]: Start difference. First operand 45745 states and 51874 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:41,913 INFO L93 Difference]: Finished difference Result 89355 states and 101386 transitions. [2022-07-21 00:13:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 336 [2022-07-21 00:13:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:41,960 INFO L225 Difference]: With dead ends: 89355 [2022-07-21 00:13:41,961 INFO L226 Difference]: Without dead ends: 44037 [2022-07-21 00:13:41,988 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 [2022-07-21 00:13:41,989 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:41,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 736 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 00:13:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44037 states. [2022-07-21 00:13:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44037 to 43610. [2022-07-21 00:13:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43610 states, 43609 states have (on average 1.1010341901900984) internal successors, (48015), 43609 states have internal predecessors, (48015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43610 states to 43610 states and 48015 transitions. [2022-07-21 00:13:42,731 INFO L78 Accepts]: Start accepts. Automaton has 43610 states and 48015 transitions. Word has length 336 [2022-07-21 00:13:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:42,732 INFO L495 AbstractCegarLoop]: Abstraction has 43610 states and 48015 transitions. [2022-07-21 00:13:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43610 states and 48015 transitions. [2022-07-21 00:13:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-07-21 00:13:42,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:42,736 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:42,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 00:13:42,737 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:42,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1217593932, now seen corresponding path program 1 times [2022-07-21 00:13:42,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:42,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732001392] [2022-07-21 00:13:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-21 00:13:42,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732001392] [2022-07-21 00:13:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732001392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:42,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:42,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:13:42,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272359353] [2022-07-21 00:13:42,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:42,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:42,862 INFO L87 Difference]: Start difference. First operand 43610 states and 48015 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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) [2022-07-21 00:13:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:44,702 INFO L93 Difference]: Finished difference Result 110697 states and 121863 transitions. [2022-07-21 00:13:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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 396 [2022-07-21 00:13:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:44,788 INFO L225 Difference]: With dead ends: 110697 [2022-07-21 00:13:44,789 INFO L226 Difference]: Without dead ends: 67074 [2022-07-21 00:13:44,818 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 [2022-07-21 00:13:44,818 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 475 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:44,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 212 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 00:13:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67074 states. [2022-07-21 00:13:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67074 to 64910. [2022-07-21 00:13:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64910 states, 64909 states have (on average 1.0915589517632378) internal successors, (70852), 64909 states have internal predecessors, (70852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64910 states to 64910 states and 70852 transitions. [2022-07-21 00:13:45,641 INFO L78 Accepts]: Start accepts. Automaton has 64910 states and 70852 transitions. Word has length 396 [2022-07-21 00:13:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:45,641 INFO L495 AbstractCegarLoop]: Abstraction has 64910 states and 70852 transitions. [2022-07-21 00:13:45,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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) [2022-07-21 00:13:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 64910 states and 70852 transitions. [2022-07-21 00:13:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-07-21 00:13:45,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:45,649 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:45,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 00:13:45,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2020271132, now seen corresponding path program 1 times [2022-07-21 00:13:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:45,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917783316] [2022-07-21 00:13:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-07-21 00:13:45,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:45,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917783316] [2022-07-21 00:13:45,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917783316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:45,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:45,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 00:13:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122328849] [2022-07-21 00:13:45,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:45,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:45,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:45,984 INFO L87 Difference]: Start difference. First operand 64910 states and 70852 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:47,154 INFO L93 Difference]: Finished difference Result 126827 states and 138388 transitions. [2022-07-21 00:13:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:13:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2022-07-21 00:13:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:47,229 INFO L225 Difference]: With dead ends: 126827 [2022-07-21 00:13:47,229 INFO L226 Difference]: Without dead ends: 62343 [2022-07-21 00:13:47,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:13:47,273 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 637 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:47,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 102 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 00:13:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62343 states. [2022-07-21 00:13:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62343 to 62332. [2022-07-21 00:13:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62332 states, 62331 states have (on average 1.0897306316279218) internal successors, (67924), 62331 states have internal predecessors, (67924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62332 states to 62332 states and 67924 transitions. [2022-07-21 00:13:48,020 INFO L78 Accepts]: Start accepts. Automaton has 62332 states and 67924 transitions. Word has length 455 [2022-07-21 00:13:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:48,021 INFO L495 AbstractCegarLoop]: Abstraction has 62332 states and 67924 transitions. [2022-07-21 00:13:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 62332 states and 67924 transitions. [2022-07-21 00:13:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-07-21 00:13:48,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:48,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-21 00:13:48,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 00:13:48,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1958053970, now seen corresponding path program 1 times [2022-07-21 00:13:48,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:48,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213286115] [2022-07-21 00:13:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-21 00:13:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:48,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213286115] [2022-07-21 00:13:48,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213286115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:13:48,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:13:48,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 00:13:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462055951] [2022-07-21 00:13:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:48,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 00:13:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 00:13:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 00:13:48,318 INFO L87 Difference]: Start difference. First operand 62332 states and 67924 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:50,966 INFO L93 Difference]: Finished difference Result 140024 states and 152285 transitions. [2022-07-21 00:13:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 00:13:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 495 [2022-07-21 00:13:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:51,068 INFO L225 Difference]: With dead ends: 140024 [2022-07-21 00:13:51,068 INFO L226 Difference]: Without dead ends: 77693 [2022-07-21 00:13:51,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 00:13:51,230 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 893 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:51,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 253 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-21 00:13:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77693 states. [2022-07-21 00:13:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77693 to 59337. [2022-07-21 00:13:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59337 states, 59336 states have (on average 1.082361466900364) internal successors, (64223), 59336 states have internal predecessors, (64223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59337 states to 59337 states and 64223 transitions. [2022-07-21 00:13:52,019 INFO L78 Accepts]: Start accepts. Automaton has 59337 states and 64223 transitions. Word has length 495 [2022-07-21 00:13:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:52,020 INFO L495 AbstractCegarLoop]: Abstraction has 59337 states and 64223 transitions. [2022-07-21 00:13:52,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 59337 states and 64223 transitions. [2022-07-21 00:13:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-07-21 00:13:52,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:52,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 00:13:52,031 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -564339835, now seen corresponding path program 1 times [2022-07-21 00:13:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:52,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765984519] [2022-07-21 00:13:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 414 proven. 82 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-21 00:13:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:52,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765984519] [2022-07-21 00:13:52,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765984519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 00:13:52,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027019797] [2022-07-21 00:13:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:52,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 00:13:52,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 00:13:52,335 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) [2022-07-21 00:13:52,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 00:13:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 00:13:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 00:13:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 414 proven. 82 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-21 00:13:52,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 00:13:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-21 00:13:53,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027019797] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 00:13:53,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 00:13:53,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-21 00:13:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617618933] [2022-07-21 00:13:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 00:13:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:53,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 00:13:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 00:13:53,239 INFO L87 Difference]: Start difference. First operand 59337 states and 64223 transitions. Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:13:56,094 INFO L93 Difference]: Finished difference Result 147196 states and 159116 transitions. [2022-07-21 00:13:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 00:13:56,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 504 [2022-07-21 00:13:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:13:56,209 INFO L225 Difference]: With dead ends: 147196 [2022-07-21 00:13:56,210 INFO L226 Difference]: Without dead ends: 88286 [2022-07-21 00:13:56,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1003 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 00:13:56,459 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 818 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-21 00:13:56,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 107 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-21 00:13:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88286 states. [2022-07-21 00:13:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88286 to 83986. [2022-07-21 00:13:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83986 states, 83985 states have (on average 1.0732868964696076) internal successors, (90140), 83985 states have internal predecessors, (90140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83986 states to 83986 states and 90140 transitions. [2022-07-21 00:13:57,642 INFO L78 Accepts]: Start accepts. Automaton has 83986 states and 90140 transitions. Word has length 504 [2022-07-21 00:13:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:13:57,643 INFO L495 AbstractCegarLoop]: Abstraction has 83986 states and 90140 transitions. [2022-07-21 00:13:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:13:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 83986 states and 90140 transitions. [2022-07-21 00:13:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-21 00:13:57,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:13:57,654 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:13:57,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 00:13:57,854 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,SelfDestructingSolverStorable14 [2022-07-21 00:13:57,855 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:13:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:13:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1515115607, now seen corresponding path program 1 times [2022-07-21 00:13:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:13:57,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150431962] [2022-07-21 00:13:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:13:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 715 proven. 72 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-21 00:13:58,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:13:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150431962] [2022-07-21 00:13:58,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150431962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 00:13:58,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757381421] [2022-07-21 00:13:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:13:58,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 00:13:58,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 00:13:58,056 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) [2022-07-21 00:13:58,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 00:13:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:13:58,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 00:13:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 00:13:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 547 proven. 216 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-07-21 00:13:59,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 00:13:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-07-21 00:13:59,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757381421] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 00:13:59,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 00:13:59,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-07-21 00:13:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830866644] [2022-07-21 00:13:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:13:59,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:13:59,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:13:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:13:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 00:13:59,356 INFO L87 Difference]: Start difference. First operand 83986 states and 90140 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:14:01,537 INFO L93 Difference]: Finished difference Result 177762 states and 190553 transitions. [2022-07-21 00:14:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:14:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2022-07-21 00:14:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:14:01,782 INFO L225 Difference]: With dead ends: 177762 [2022-07-21 00:14:01,783 INFO L226 Difference]: Without dead ends: 94203 [2022-07-21 00:14:01,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 00:14:01,808 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 388 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 00:14:01,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 765 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 00:14:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94203 states. [2022-07-21 00:14:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94203 to 90357. [2022-07-21 00:14:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90357 states, 90356 states have (on average 1.0645668245606268) internal successors, (96190), 90356 states have internal predecessors, (96190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90357 states to 90357 states and 96190 transitions. [2022-07-21 00:14:03,248 INFO L78 Accepts]: Start accepts. Automaton has 90357 states and 96190 transitions. Word has length 513 [2022-07-21 00:14:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:14:03,249 INFO L495 AbstractCegarLoop]: Abstraction has 90357 states and 96190 transitions. [2022-07-21 00:14:03,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 90357 states and 96190 transitions. [2022-07-21 00:14:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-21 00:14:03,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:14:03,259 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:14:03,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 00:14:03,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 00:14:03,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:14:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:14:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash 589170808, now seen corresponding path program 1 times [2022-07-21 00:14:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:14:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804966316] [2022-07-21 00:14:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:14:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:14:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:14:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 793 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-21 00:14:03,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:14:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804966316] [2022-07-21 00:14:03,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804966316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:14:03,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:14:03,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 00:14:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305874535] [2022-07-21 00:14:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:14:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 00:14:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:14:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 00:14:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 00:14:03,605 INFO L87 Difference]: Start difference. First operand 90357 states and 96190 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:14:06,669 INFO L93 Difference]: Finished difference Result 214793 states and 228199 transitions. [2022-07-21 00:14:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 00:14:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-07-21 00:14:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:14:06,836 INFO L225 Difference]: With dead ends: 214793 [2022-07-21 00:14:06,836 INFO L226 Difference]: Without dead ends: 124863 [2022-07-21 00:14:07,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 00:14:07,069 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 840 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 00:14:07,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 186 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-21 00:14:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124863 states. [2022-07-21 00:14:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124863 to 117625. [2022-07-21 00:14:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117625 states, 117624 states have (on average 1.0620536625178536) internal successors, (124923), 117624 states have internal predecessors, (124923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117625 states to 117625 states and 124923 transitions. [2022-07-21 00:14:08,770 INFO L78 Accepts]: Start accepts. Automaton has 117625 states and 124923 transitions. Word has length 519 [2022-07-21 00:14:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:14:08,770 INFO L495 AbstractCegarLoop]: Abstraction has 117625 states and 124923 transitions. [2022-07-21 00:14:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 117625 states and 124923 transitions. [2022-07-21 00:14:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-07-21 00:14:08,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:14:08,782 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:14:08,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 00:14:08,783 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:14:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:14:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1068627681, now seen corresponding path program 1 times [2022-07-21 00:14:08,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:14:08,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053623506] [2022-07-21 00:14:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:14:08,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:14:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:14:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 750 proven. 89 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-21 00:14:08,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:14:08,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053623506] [2022-07-21 00:14:08,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053623506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 00:14:08,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632018609] [2022-07-21 00:14:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:14:08,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 00:14:08,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 00:14:08,938 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) [2022-07-21 00:14:08,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 00:14:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:14:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 00:14:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 00:14:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 952 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-21 00:14:09,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 00:14:09,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632018609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:14:09,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 00:14:09,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-21 00:14:09,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935963179] [2022-07-21 00:14:09,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:14:09,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 00:14:09,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:14:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 00:14:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 00:14:09,597 INFO L87 Difference]: Start difference. First operand 117625 states and 124923 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:14:12,663 INFO L93 Difference]: Finished difference Result 247602 states and 262833 transitions. [2022-07-21 00:14:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 00:14:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 530 [2022-07-21 00:14:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:14:12,861 INFO L225 Difference]: With dead ends: 247602 [2022-07-21 00:14:12,861 INFO L226 Difference]: Without dead ends: 130404 [2022-07-21 00:14:12,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 00:14:12,906 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 758 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-21 00:14:12,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 308 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-21 00:14:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130404 states. [2022-07-21 00:14:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130404 to 126991. [2022-07-21 00:14:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126991 states, 126990 states have (on average 1.0588944011339476) internal successors, (134469), 126990 states have internal predecessors, (134469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126991 states to 126991 states and 134469 transitions. [2022-07-21 00:14:14,785 INFO L78 Accepts]: Start accepts. Automaton has 126991 states and 134469 transitions. Word has length 530 [2022-07-21 00:14:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:14:14,786 INFO L495 AbstractCegarLoop]: Abstraction has 126991 states and 134469 transitions. [2022-07-21 00:14:14,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 126991 states and 134469 transitions. [2022-07-21 00:14:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-07-21 00:14:14,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:14:14,800 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:14:14,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 00:14:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 00:14:15,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:14:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:14:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1090391391, now seen corresponding path program 1 times [2022-07-21 00:14:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:14:15,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109911494] [2022-07-21 00:14:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:14:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:14:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:14:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-21 00:14:15,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:14:15,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109911494] [2022-07-21 00:14:15,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109911494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:14:15,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:14:15,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 00:14:15,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551052056] [2022-07-21 00:14:15,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:14:15,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 00:14:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:14:15,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 00:14:15,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 00:14:15,173 INFO L87 Difference]: Start difference. First operand 126991 states and 134469 transitions. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:14:18,707 INFO L93 Difference]: Finished difference Result 291895 states and 308533 transitions. [2022-07-21 00:14:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 00:14:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 564 [2022-07-21 00:14:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:14:18,939 INFO L225 Difference]: With dead ends: 291895 [2022-07-21 00:14:18,940 INFO L226 Difference]: Without dead ends: 165331 [2022-07-21 00:14:19,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 00:14:19,011 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 779 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 00:14:19,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 226 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-21 00:14:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165331 states. [2022-07-21 00:14:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165331 to 158092. [2022-07-21 00:14:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158092 states, 158091 states have (on average 1.0550821994926973) internal successors, (166799), 158091 states have internal predecessors, (166799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158092 states to 158092 states and 166799 transitions. [2022-07-21 00:14:21,678 INFO L78 Accepts]: Start accepts. Automaton has 158092 states and 166799 transitions. Word has length 564 [2022-07-21 00:14:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:14:21,679 INFO L495 AbstractCegarLoop]: Abstraction has 158092 states and 166799 transitions. [2022-07-21 00:14:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 158092 states and 166799 transitions. [2022-07-21 00:14:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-07-21 00:14:21,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:14:21,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:14:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 00:14:21,691 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:14:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:14:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash 345832821, now seen corresponding path program 1 times [2022-07-21 00:14:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:14:21,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569380821] [2022-07-21 00:14:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:14:21,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:14:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:14:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-07-21 00:14:21,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:14:21,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569380821] [2022-07-21 00:14:21,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569380821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:14:21,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:14:21,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 00:14:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304630341] [2022-07-21 00:14:21,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:14:21,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 00:14:21,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:14:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 00:14:21,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 00:14:21,850 INFO L87 Difference]: Start difference. First operand 158092 states and 166799 transitions. Second operand has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:14:26,453 INFO L93 Difference]: Finished difference Result 391579 states and 412382 transitions. [2022-07-21 00:14:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 00:14:26,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 569 [2022-07-21 00:14:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:14:26,848 INFO L225 Difference]: With dead ends: 391579 [2022-07-21 00:14:26,848 INFO L226 Difference]: Without dead ends: 231362 [2022-07-21 00:14:26,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 00:14:26,964 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1356 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-21 00:14:26,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 255 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-21 00:14:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231362 states. [2022-07-21 00:14:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231362 to 218542. [2022-07-21 00:14:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218542 states, 218541 states have (on average 1.0507090202753717) internal successors, (229623), 218541 states have internal predecessors, (229623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218542 states to 218542 states and 229623 transitions. [2022-07-21 00:14:30,334 INFO L78 Accepts]: Start accepts. Automaton has 218542 states and 229623 transitions. Word has length 569 [2022-07-21 00:14:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 00:14:30,334 INFO L495 AbstractCegarLoop]: Abstraction has 218542 states and 229623 transitions. [2022-07-21 00:14:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 218542 states and 229623 transitions. [2022-07-21 00:14:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-07-21 00:14:30,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 00:14:30,352 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 00:14:30,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 00:14:30,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 00:14:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 00:14:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash -927520867, now seen corresponding path program 1 times [2022-07-21 00:14:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 00:14:30,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953940336] [2022-07-21 00:14:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 00:14:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 00:14:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 00:14:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-21 00:14:30,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 00:14:30,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953940336] [2022-07-21 00:14:30,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953940336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 00:14:30,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 00:14:30,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 00:14:30,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167153453] [2022-07-21 00:14:30,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 00:14:30,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 00:14:30,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 00:14:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 00:14:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 00:14:30,912 INFO L87 Difference]: Start difference. First operand 218542 states and 229623 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 00:14:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 00:14:34,005 INFO L93 Difference]: Finished difference Result 453684 states and 477155 transitions. [2022-07-21 00:14:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 00:14:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 586 [2022-07-21 00:14:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 00:14:34,391 INFO L225 Difference]: With dead ends: 453684 [2022-07-21 00:14:34,391 INFO L226 Difference]: Without dead ends: 235144 [2022-07-21 00:14:34,511 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 [2022-07-21 00:14:34,512 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 280 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 00:14:34,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 352 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 00:14:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235144 states.