./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_label54.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 11e41592a4a90a36b9d41c817b9251e7ae28a6a8e3ac5da0511d1aedc7736ffe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 22:59:02,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 22:59:02,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 22:59:02,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 22:59:02,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 22:59:02,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 22:59:02,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 22:59:02,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 22:59:02,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 22:59:02,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 22:59:02,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 22:59:02,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 22:59:02,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 22:59:02,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 22:59:02,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 22:59:02,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 22:59:02,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 22:59:02,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 22:59:02,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 22:59:02,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 22:59:02,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 22:59:02,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 22:59:02,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 22:59:02,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 22:59:02,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 22:59:02,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 22:59:02,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 22:59:02,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 22:59:02,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 22:59:02,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 22:59:02,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 22:59:02,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 22:59:02,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 22:59:02,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 22:59:02,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 22:59:02,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 22:59:02,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 22:59:02,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 22:59:02,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 22:59:02,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 22:59:02,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 22:59:02,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 22:59:02,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 22:59:02,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 22:59:02,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 22:59:02,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 22:59:02,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 22:59:02,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 22:59:02,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 22:59:02,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 22:59:02,494 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 22:59:02,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 22:59:02,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 22:59:02,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 22:59:02,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 22:59:02,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 22:59:02,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 22:59:02,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 22:59:02,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 22:59:02,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:59:02,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 22:59:02,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 22:59:02,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 22:59:02,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 22:59:02,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 22:59:02,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 22:59:02,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 22:59:02,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 22:59:02,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11e41592a4a90a36b9d41c817b9251e7ae28a6a8e3ac5da0511d1aedc7736ffe [2021-12-27 22:59:02,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 22:59:02,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 22:59:02,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 22:59:02,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 22:59:02,779 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 22:59:02,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label54.c [2021-12-27 22:59:02,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a8d8302/be054e1ecd0448c0a42907aa5e2438f8/FLAG525741229 [2021-12-27 22:59:03,341 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 22:59:03,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label54.c [2021-12-27 22:59:03,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a8d8302/be054e1ecd0448c0a42907aa5e2438f8/FLAG525741229 [2021-12-27 22:59:03,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a8d8302/be054e1ecd0448c0a42907aa5e2438f8 [2021-12-27 22:59:03,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 22:59:03,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 22:59:03,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 22:59:03,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 22:59:03,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 22:59:03,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:59:03" (1/1) ... [2021-12-27 22:59:03,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c53fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:03, skipping insertion in model container [2021-12-27 22:59:03,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:59:03" (1/1) ... [2021-12-27 22:59:03,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 22:59:03,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 22:59:04,001 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_label54.c[2072,2085] [2021-12-27 22:59:04,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:59:04,453 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 22:59:04,471 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_label54.c[2072,2085] [2021-12-27 22:59:04,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:59:04,661 INFO L208 MainTranslator]: Completed translation [2021-12-27 22:59:04,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04 WrapperNode [2021-12-27 22:59:04,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 22:59:04,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 22:59:04,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 22:59:04,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 22:59:04,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:04,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,027 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-27 22:59:05,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 22:59:05,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 22:59:05,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 22:59:05,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 22:59:05,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 22:59:05,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 22:59:05,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 22:59:05,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 22:59:05,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (1/1) ... [2021-12-27 22:59:05,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:59:05,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:59:05,417 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) [2021-12-27 22:59:05,435 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 [2021-12-27 22:59:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 22:59:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 22:59:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 22:59:05,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 22:59:05,494 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 22:59:05,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 22:59:07,720 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 22:59:07,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 22:59:07,729 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 22:59:07,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:59:07 BoogieIcfgContainer [2021-12-27 22:59:07,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 22:59:07,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 22:59:07,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 22:59:07,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 22:59:07,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 10:59:03" (1/3) ... [2021-12-27 22:59:07,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c8fc14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:59:07, skipping insertion in model container [2021-12-27 22:59:07,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:59:04" (2/3) ... [2021-12-27 22:59:07,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c8fc14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:59:07, skipping insertion in model container [2021-12-27 22:59:07,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:59:07" (3/3) ... [2021-12-27 22:59:07,736 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label54.c [2021-12-27 22:59:07,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 22:59:07,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 22:59:07,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 22:59:07,775 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 22:59:07,776 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 22:59:07,791 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) [2021-12-27 22:59:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 22:59:07,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:07,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:07,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-12-27 22:59:07,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:07,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027767574] [2021-12-27 22:59:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:07,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:07,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:07,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027767574] [2021-12-27 22:59:07,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027767574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:07,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:07,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:59:07,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058025451] [2021-12-27 22:59:07,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:07,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:07,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:07,984 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:10,302 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-27 22:59:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-27 22:59:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:10,317 INFO L225 Difference]: With dead ends: 1667 [2021-12-27 22:59:10,317 INFO L226 Difference]: Without dead ends: 998 [2021-12-27 22:59:10,321 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:10,323 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 532 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:10,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-27 22:59:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-27 22:59:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-27 22:59:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-27 22:59:10,400 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 13 [2021-12-27 22:59:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:10,400 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-27 22:59:10,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-27 22:59:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-27 22:59:10,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:10,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:10,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 22:59:10,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2108516819, now seen corresponding path program 1 times [2021-12-27 22:59:10,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97317509] [2021-12-27 22:59:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:10,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:10,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:10,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97317509] [2021-12-27 22:59:10,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97317509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:10,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:10,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:59:10,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661702424] [2021-12-27 22:59:10,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:10,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:10,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:10,561 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:12,410 INFO L93 Difference]: Finished difference Result 2843 states and 4882 transitions. [2021-12-27 22:59:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:12,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-27 22:59:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:12,416 INFO L225 Difference]: With dead ends: 2843 [2021-12-27 22:59:12,417 INFO L226 Difference]: Without dead ends: 1863 [2021-12-27 22:59:12,418 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:12,419 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:12,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 495 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-27 22:59:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-12-27 22:59:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1857. [2021-12-27 22:59:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4552801724137931) internal successors, (2701), 1856 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2701 transitions. [2021-12-27 22:59:12,454 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2701 transitions. Word has length 78 [2021-12-27 22:59:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:12,454 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2701 transitions. [2021-12-27 22:59:12,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2701 transitions. [2021-12-27 22:59:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-27 22:59:12,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:12,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:12,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 22:59:12,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash -42874468, now seen corresponding path program 1 times [2021-12-27 22:59:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154948138] [2021-12-27 22:59:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:12,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:12,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154948138] [2021-12-27 22:59:12,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154948138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:12,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:12,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:59:12,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001393037] [2021-12-27 22:59:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:12,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:12,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:12,509 INFO L87 Difference]: Start difference. First operand 1857 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:14,090 INFO L93 Difference]: Finished difference Result 5425 states and 7895 transitions. [2021-12-27 22:59:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:14,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-27 22:59:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:14,105 INFO L225 Difference]: With dead ends: 5425 [2021-12-27 22:59:14,105 INFO L226 Difference]: Without dead ends: 3570 [2021-12-27 22:59:14,108 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:14,109 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 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, 1.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:14,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-27 22:59:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-12-27 22:59:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 2714. [2021-12-27 22:59:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.315886472539624) internal successors, (3570), 2713 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3570 transitions. [2021-12-27 22:59:14,154 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3570 transitions. Word has length 84 [2021-12-27 22:59:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:14,156 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3570 transitions. [2021-12-27 22:59:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3570 transitions. [2021-12-27 22:59:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-27 22:59:14,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:14,165 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:14,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 22:59:14,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash -609171172, now seen corresponding path program 1 times [2021-12-27 22:59:14,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145167559] [2021-12-27 22:59:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:14,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:14,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145167559] [2021-12-27 22:59:14,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145167559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:14,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:14,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 22:59:14,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546138812] [2021-12-27 22:59:14,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:14,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 22:59:14,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:14,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 22:59:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:59:14,292 INFO L87 Difference]: Start difference. First operand 2714 states and 3570 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:16,405 INFO L93 Difference]: Finished difference Result 7159 states and 9653 transitions. [2021-12-27 22:59:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:59:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-27 22:59:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:16,418 INFO L225 Difference]: With dead ends: 7159 [2021-12-27 22:59:16,419 INFO L226 Difference]: Without dead ends: 4447 [2021-12-27 22:59:16,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 22:59:16,423 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1658 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:16,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 843 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-27 22:59:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2021-12-27 22:59:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 4424. [2021-12-27 22:59:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 1.2912050644359032) internal successors, (5711), 4423 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 5711 transitions. [2021-12-27 22:59:16,486 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 5711 transitions. Word has length 161 [2021-12-27 22:59:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:16,487 INFO L470 AbstractCegarLoop]: Abstraction has 4424 states and 5711 transitions. [2021-12-27 22:59:16,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 5711 transitions. [2021-12-27 22:59:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-27 22:59:16,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:16,489 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:16,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 22:59:16,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1294742197, now seen corresponding path program 1 times [2021-12-27 22:59:16,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:16,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236802067] [2021-12-27 22:59:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:16,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-27 22:59:16,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:16,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236802067] [2021-12-27 22:59:16,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236802067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:16,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:16,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:16,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589801403] [2021-12-27 22:59:16,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:16,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:16,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:16,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:16,614 INFO L87 Difference]: Start difference. First operand 4424 states and 5711 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:18,539 INFO L93 Difference]: Finished difference Result 10593 states and 13804 transitions. [2021-12-27 22:59:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-27 22:59:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:18,554 INFO L225 Difference]: With dead ends: 10593 [2021-12-27 22:59:18,554 INFO L226 Difference]: Without dead ends: 6171 [2021-12-27 22:59:18,558 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:18,559 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 540 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:18,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 240 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-27 22:59:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2021-12-27 22:59:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 6153. [2021-12-27 22:59:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 1.303966189856957) internal successors, (8022), 6152 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8022 transitions. [2021-12-27 22:59:18,625 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8022 transitions. Word has length 167 [2021-12-27 22:59:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:18,626 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 8022 transitions. [2021-12-27 22:59:18,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8022 transitions. [2021-12-27 22:59:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-27 22:59:18,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:18,628 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-27 22:59:18,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 22:59:18,629 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash -516019643, now seen corresponding path program 1 times [2021-12-27 22:59:18,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661523737] [2021-12-27 22:59:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:18,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:18,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661523737] [2021-12-27 22:59:18,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661523737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:59:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573163292] [2021-12-27 22:59:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:18,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:59:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:59:18,749 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) [2021-12-27 22:59:18,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 22:59:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:59:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:59:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:19,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:59:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:19,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573163292] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-27 22:59:19,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-27 22:59:19,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-27 22:59:19,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134630569] [2021-12-27 22:59:19,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:19,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:59:19,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:59:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:59:19,940 INFO L87 Difference]: Start difference. First operand 6153 states and 8022 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:22,790 INFO L93 Difference]: Finished difference Result 19997 states and 26780 transitions. [2021-12-27 22:59:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:59:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-12-27 22:59:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:22,820 INFO L225 Difference]: With dead ends: 19997 [2021-12-27 22:59:22,821 INFO L226 Difference]: Without dead ends: 12537 [2021-12-27 22:59:22,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 461 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-27 22:59:22,830 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 848 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:22,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 168 Invalid, 3143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-27 22:59:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12537 states. [2021-12-27 22:59:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12537 to 12531. [2021-12-27 22:59:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12531 states, 12530 states have (on average 1.2289704708699123) internal successors, (15399), 12530 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12531 states to 12531 states and 15399 transitions. [2021-12-27 22:59:22,993 INFO L78 Accepts]: Start accepts. Automaton has 12531 states and 15399 transitions. Word has length 233 [2021-12-27 22:59:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:22,993 INFO L470 AbstractCegarLoop]: Abstraction has 12531 states and 15399 transitions. [2021-12-27 22:59:22,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 12531 states and 15399 transitions. [2021-12-27 22:59:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-27 22:59:22,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:22,997 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-27 22:59:23,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 22:59:23,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-27 22:59:23,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash -989593744, now seen corresponding path program 1 times [2021-12-27 22:59:23,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610915185] [2021-12-27 22:59:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:23,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-27 22:59:23,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:23,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610915185] [2021-12-27 22:59:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610915185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:23,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:23,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:23,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562767203] [2021-12-27 22:59:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:23,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:23,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:23,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:23,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:23,314 INFO L87 Difference]: Start difference. First operand 12531 states and 15399 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:24,915 INFO L93 Difference]: Finished difference Result 30195 states and 36859 transitions. [2021-12-27 22:59:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-12-27 22:59:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:24,938 INFO L225 Difference]: With dead ends: 30195 [2021-12-27 22:59:24,939 INFO L226 Difference]: Without dead ends: 16816 [2021-12-27 22:59:24,950 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:24,951 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 445 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:24,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 859 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-27 22:59:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16816 states. [2021-12-27 22:59:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16816 to 16805. [2021-12-27 22:59:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16805 states, 16804 states have (on average 1.1906688883599144) internal successors, (20008), 16804 states have internal predecessors, (20008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16805 states to 16805 states and 20008 transitions. [2021-12-27 22:59:25,133 INFO L78 Accepts]: Start accepts. Automaton has 16805 states and 20008 transitions. Word has length 270 [2021-12-27 22:59:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:25,134 INFO L470 AbstractCegarLoop]: Abstraction has 16805 states and 20008 transitions. [2021-12-27 22:59:25,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 16805 states and 20008 transitions. [2021-12-27 22:59:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-27 22:59:25,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:25,139 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:25,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 22:59:25,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2083196120, now seen corresponding path program 1 times [2021-12-27 22:59:25,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578262298] [2021-12-27 22:59:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:25,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-27 22:59:25,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578262298] [2021-12-27 22:59:25,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578262298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:25,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:25,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:25,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166818290] [2021-12-27 22:59:25,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:25,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:25,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:25,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:25,276 INFO L87 Difference]: Start difference. First operand 16805 states and 20008 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:26,932 INFO L93 Difference]: Finished difference Result 40835 states and 48524 transitions. [2021-12-27 22:59:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 316 [2021-12-27 22:59:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:26,962 INFO L225 Difference]: With dead ends: 40835 [2021-12-27 22:59:26,962 INFO L226 Difference]: Without dead ends: 22750 [2021-12-27 22:59:26,977 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:26,978 INFO L933 BasicCegarLoop]: 749 mSDtfsCounter, 375 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:26,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 809 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-27 22:59:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22750 states. [2021-12-27 22:59:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22750 to 22319. [2021-12-27 22:59:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22319 states, 22318 states have (on average 1.1310601308360964) internal successors, (25243), 22318 states have internal predecessors, (25243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22319 states to 22319 states and 25243 transitions. [2021-12-27 22:59:27,179 INFO L78 Accepts]: Start accepts. Automaton has 22319 states and 25243 transitions. Word has length 316 [2021-12-27 22:59:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:27,180 INFO L470 AbstractCegarLoop]: Abstraction has 22319 states and 25243 transitions. [2021-12-27 22:59:27,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22319 states and 25243 transitions. [2021-12-27 22:59:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-27 22:59:27,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:27,185 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:27,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 22:59:27,186 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1965923311, now seen corresponding path program 1 times [2021-12-27 22:59:27,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:27,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324514886] [2021-12-27 22:59:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:27,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-27 22:59:27,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:27,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324514886] [2021-12-27 22:59:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324514886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:27,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:27,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429029074] [2021-12-27 22:59:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:27,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:27,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:27,280 INFO L87 Difference]: Start difference. First operand 22319 states and 25243 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:28,707 INFO L93 Difference]: Finished difference Result 49310 states and 56001 transitions. [2021-12-27 22:59:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 341 [2021-12-27 22:59:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:28,747 INFO L225 Difference]: With dead ends: 49310 [2021-12-27 22:59:28,747 INFO L226 Difference]: Without dead ends: 26993 [2021-12-27 22:59:28,765 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:28,766 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 369 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:28,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 793 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-27 22:59:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2021-12-27 22:59:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26993. [2021-12-27 22:59:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 1.117553349140486) internal successors, (30165), 26992 states have internal predecessors, (30165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 30165 transitions. [2021-12-27 22:59:29,033 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 30165 transitions. Word has length 341 [2021-12-27 22:59:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:29,034 INFO L470 AbstractCegarLoop]: Abstraction has 26993 states and 30165 transitions. [2021-12-27 22:59:29,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 30165 transitions. [2021-12-27 22:59:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-27 22:59:29,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:29,039 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:29,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 22:59:29,040 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1643090791, now seen corresponding path program 1 times [2021-12-27 22:59:29,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751408193] [2021-12-27 22:59:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:29,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-27 22:59:29,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:29,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751408193] [2021-12-27 22:59:29,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751408193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:29,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:29,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:29,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831347313] [2021-12-27 22:59:29,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:29,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:29,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:29,157 INFO L87 Difference]: Start difference. First operand 26993 states and 30165 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:30,630 INFO L93 Difference]: Finished difference Result 65050 states and 73043 transitions. [2021-12-27 22:59:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 351 [2021-12-27 22:59:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:30,668 INFO L225 Difference]: With dead ends: 65050 [2021-12-27 22:59:30,668 INFO L226 Difference]: Without dead ends: 35507 [2021-12-27 22:59:30,689 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:30,690 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 288 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:30,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 743 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-27 22:59:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35507 states. [2021-12-27 22:59:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35507 to 29956. [2021-12-27 22:59:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29956 states, 29955 states have (on average 1.100918043732265) internal successors, (32978), 29955 states have internal predecessors, (32978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29956 states to 29956 states and 32978 transitions. [2021-12-27 22:59:31,002 INFO L78 Accepts]: Start accepts. Automaton has 29956 states and 32978 transitions. Word has length 351 [2021-12-27 22:59:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:31,003 INFO L470 AbstractCegarLoop]: Abstraction has 29956 states and 32978 transitions. [2021-12-27 22:59:31,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 29956 states and 32978 transitions. [2021-12-27 22:59:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-12-27 22:59:31,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:31,008 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:31,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 22:59:31,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash -600451555, now seen corresponding path program 1 times [2021-12-27 22:59:31,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252609980] [2021-12-27 22:59:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:31,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-27 22:59:31,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252609980] [2021-12-27 22:59:31,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252609980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:31,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:31,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:31,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245494857] [2021-12-27 22:59:31,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:31,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:31,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:31,153 INFO L87 Difference]: Start difference. First operand 29956 states and 32978 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:33,198 INFO L93 Difference]: Finished difference Result 68451 states and 75419 transitions. [2021-12-27 22:59:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 376 [2021-12-27 22:59:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:33,239 INFO L225 Difference]: With dead ends: 68451 [2021-12-27 22:59:33,239 INFO L226 Difference]: Without dead ends: 38497 [2021-12-27 22:59:33,261 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:33,262 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 498 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:33,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 171 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-27 22:59:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38497 states. [2021-12-27 22:59:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38497 to 30379. [2021-12-27 22:59:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30379 states, 30378 states have (on average 1.1004674435446704) internal successors, (33430), 30378 states have internal predecessors, (33430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30379 states to 30379 states and 33430 transitions. [2021-12-27 22:59:33,698 INFO L78 Accepts]: Start accepts. Automaton has 30379 states and 33430 transitions. Word has length 376 [2021-12-27 22:59:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:33,698 INFO L470 AbstractCegarLoop]: Abstraction has 30379 states and 33430 transitions. [2021-12-27 22:59:33,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 30379 states and 33430 transitions. [2021-12-27 22:59:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-12-27 22:59:33,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:33,710 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:33,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 22:59:33,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash 719908107, now seen corresponding path program 1 times [2021-12-27 22:59:33,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548121105] [2021-12-27 22:59:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:33,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-27 22:59:33,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548121105] [2021-12-27 22:59:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548121105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:33,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:33,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:33,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455363174] [2021-12-27 22:59:33,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:33,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:33,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:33,877 INFO L87 Difference]: Start difference. First operand 30379 states and 33430 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:35,457 INFO L93 Difference]: Finished difference Result 71406 states and 79006 transitions. [2021-12-27 22:59:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 487 [2021-12-27 22:59:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:35,502 INFO L225 Difference]: With dead ends: 71406 [2021-12-27 22:59:35,502 INFO L226 Difference]: Without dead ends: 41029 [2021-12-27 22:59:35,523 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:35,524 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 472 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:35,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 318 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-27 22:59:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41029 states. [2021-12-27 22:59:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41029 to 38040. [2021-12-27 22:59:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38040 states, 38039 states have (on average 1.1000814953074476) internal successors, (41846), 38039 states have internal predecessors, (41846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38040 states to 38040 states and 41846 transitions. [2021-12-27 22:59:35,987 INFO L78 Accepts]: Start accepts. Automaton has 38040 states and 41846 transitions. Word has length 487 [2021-12-27 22:59:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:35,988 INFO L470 AbstractCegarLoop]: Abstraction has 38040 states and 41846 transitions. [2021-12-27 22:59:35,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 38040 states and 41846 transitions. [2021-12-27 22:59:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-27 22:59:36,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:36,122 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:36,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 22:59:36,122 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1160624918, now seen corresponding path program 1 times [2021-12-27 22:59:36,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:36,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107326779] [2021-12-27 22:59:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:36,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:59:36,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107326779] [2021-12-27 22:59:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107326779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:59:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462864532] [2021-12-27 22:59:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:36,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:59:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:59:36,322 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) [2021-12-27 22:59:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 22:59:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:59:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:59:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 177 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-27 22:59:37,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:59:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-27 22:59:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462864532] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-27 22:59:37,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-27 22:59:37,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-27 22:59:37,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247517409] [2021-12-27 22:59:37,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:37,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:59:37,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:59:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:59:37,920 INFO L87 Difference]: Start difference. First operand 38040 states and 41846 transitions. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:40,501 INFO L93 Difference]: Finished difference Result 93555 states and 103245 transitions. [2021-12-27 22:59:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:59:40,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 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 518 [2021-12-27 22:59:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:40,560 INFO L225 Difference]: With dead ends: 93555 [2021-12-27 22:59:40,560 INFO L226 Difference]: Without dead ends: 55517 [2021-12-27 22:59:40,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 1031 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:59:40,575 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 828 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:40,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 180 Invalid, 2686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-27 22:59:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55517 states. [2021-12-27 22:59:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55517 to 52534. [2021-12-27 22:59:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52534 states, 52533 states have (on average 1.1071707307787486) internal successors, (58163), 52533 states have internal predecessors, (58163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52534 states to 52534 states and 58163 transitions. [2021-12-27 22:59:41,371 INFO L78 Accepts]: Start accepts. Automaton has 52534 states and 58163 transitions. Word has length 518 [2021-12-27 22:59:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:41,372 INFO L470 AbstractCegarLoop]: Abstraction has 52534 states and 58163 transitions. [2021-12-27 22:59:41,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 52534 states and 58163 transitions. [2021-12-27 22:59:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-12-27 22:59:41,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:41,390 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:41,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 22:59:41,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 22:59:41,592 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash 589457783, now seen corresponding path program 1 times [2021-12-27 22:59:41,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544920535] [2021-12-27 22:59:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:41,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-27 22:59:41,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544920535] [2021-12-27 22:59:41,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544920535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:41,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:41,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:41,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510795991] [2021-12-27 22:59:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:41,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:41,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:41,747 INFO L87 Difference]: Start difference. First operand 52534 states and 58163 transitions. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:43,447 INFO L93 Difference]: Finished difference Result 122557 states and 135572 transitions. [2021-12-27 22:59:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 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 623 [2021-12-27 22:59:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:43,518 INFO L225 Difference]: With dead ends: 122557 [2021-12-27 22:59:43,518 INFO L226 Difference]: Without dead ends: 70025 [2021-12-27 22:59:43,543 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:43,543 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 431 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:43,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 591 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-27 22:59:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70025 states. [2021-12-27 22:59:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70025 to 65304. [2021-12-27 22:59:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65304 states, 65303 states have (on average 1.1082032984702082) internal successors, (72369), 65303 states have internal predecessors, (72369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65304 states to 65304 states and 72369 transitions. [2021-12-27 22:59:44,371 INFO L78 Accepts]: Start accepts. Automaton has 65304 states and 72369 transitions. Word has length 623 [2021-12-27 22:59:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:44,372 INFO L470 AbstractCegarLoop]: Abstraction has 65304 states and 72369 transitions. [2021-12-27 22:59:44,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 65304 states and 72369 transitions. [2021-12-27 22:59:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-12-27 22:59:44,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:44,395 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:44,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 22:59:44,396 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1024357676, now seen corresponding path program 1 times [2021-12-27 22:59:44,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:44,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970372047] [2021-12-27 22:59:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:44,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 458 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-27 22:59:44,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970372047] [2021-12-27 22:59:44,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970372047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:44,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:44,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:59:44,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616736379] [2021-12-27 22:59:44,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:44,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:59:44,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:44,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:59:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:59:44,780 INFO L87 Difference]: Start difference. First operand 65304 states and 72369 transitions. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:46,782 INFO L93 Difference]: Finished difference Result 151896 states and 168485 transitions. [2021-12-27 22:59:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:59:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 624 [2021-12-27 22:59:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:46,885 INFO L225 Difference]: With dead ends: 151896 [2021-12-27 22:59:46,885 INFO L226 Difference]: Without dead ends: 83609 [2021-12-27 22:59:46,928 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:46,929 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 422 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:46,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 646 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-27 22:59:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83609 states. [2021-12-27 22:59:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83609 to 78073. [2021-12-27 22:59:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78073 states, 78072 states have (on average 1.1042883492161082) internal successors, (86214), 78072 states have internal predecessors, (86214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78073 states to 78073 states and 86214 transitions. [2021-12-27 22:59:48,081 INFO L78 Accepts]: Start accepts. Automaton has 78073 states and 86214 transitions. Word has length 624 [2021-12-27 22:59:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:48,081 INFO L470 AbstractCegarLoop]: Abstraction has 78073 states and 86214 transitions. [2021-12-27 22:59:48,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 78073 states and 86214 transitions. [2021-12-27 22:59:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-12-27 22:59:48,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:48,099 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:48,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-27 22:59:48,099 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1670815035, now seen corresponding path program 1 times [2021-12-27 22:59:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258541568] [2021-12-27 22:59:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:48,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 537 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-27 22:59:48,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:48,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258541568] [2021-12-27 22:59:48,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258541568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:59:48,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:59:48,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 22:59:48,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095844003] [2021-12-27 22:59:48,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:59:48,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:59:48,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:59:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 22:59:48,417 INFO L87 Difference]: Start difference. First operand 78073 states and 86214 transitions. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:59:51,072 INFO L93 Difference]: Finished difference Result 185585 states and 205123 transitions. [2021-12-27 22:59:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:59:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 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 628 [2021-12-27 22:59:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:59:51,199 INFO L225 Difference]: With dead ends: 185585 [2021-12-27 22:59:51,199 INFO L226 Difference]: Without dead ends: 107514 [2021-12-27 22:59:51,242 INFO L932 BasicCegarLoop]: 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 [2021-12-27 22:59:51,242 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 823 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:59:51,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 180 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-27 22:59:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107514 states. [2021-12-27 22:59:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107514 to 105803. [2021-12-27 22:59:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105803 states, 105802 states have (on average 1.1054233379331204) internal successors, (116956), 105802 states have internal predecessors, (116956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105803 states to 105803 states and 116956 transitions. [2021-12-27 22:59:52,666 INFO L78 Accepts]: Start accepts. Automaton has 105803 states and 116956 transitions. Word has length 628 [2021-12-27 22:59:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:59:52,666 INFO L470 AbstractCegarLoop]: Abstraction has 105803 states and 116956 transitions. [2021-12-27 22:59:52,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:59:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 105803 states and 116956 transitions. [2021-12-27 22:59:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2021-12-27 22:59:52,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:59:52,684 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:59:52,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-27 22:59:52,684 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:59:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:59:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1726644073, now seen corresponding path program 1 times [2021-12-27 22:59:52,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:59:52,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313160862] [2021-12-27 22:59:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:52,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:59:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 375 proven. 82 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-27 22:59:53,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:59:53,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313160862] [2021-12-27 22:59:53,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313160862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:59:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843312877] [2021-12-27 22:59:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:59:53,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:59:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:59:53,116 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) [2021-12-27 22:59:53,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 22:59:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:59:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 22:59:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:59:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 375 proven. 82 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-27 22:59:55,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:59:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 456 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-27 22:59:56,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843312877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 22:59:56,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 22:59:56,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-27 22:59:56,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533909816] [2021-12-27 22:59:56,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 22:59:56,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-27 22:59:56,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:59:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-27 22:59:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-27 22:59:56,560 INFO L87 Difference]: Start difference. First operand 105803 states and 116956 transitions. Second operand has 10 states, 10 states have (on average 89.2) internal successors, (892), 9 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:00:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:00:01,408 INFO L93 Difference]: Finished difference Result 228819 states and 252588 transitions. [2021-12-27 23:00:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-27 23:00:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 89.2) internal successors, (892), 9 states have internal predecessors, (892), 0 states have call successors, (0), 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 643 [2021-12-27 23:00:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:00:01,542 INFO L225 Difference]: With dead ends: 228819 [2021-12-27 23:00:01,543 INFO L226 Difference]: Without dead ends: 123018 [2021-12-27 23:00:01,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1295 GetRequests, 1280 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-27 23:00:01,578 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 3575 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3575 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 5885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-27 23:00:01,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3575 Valid, 316 Invalid, 5885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-27 23:00:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123018 states. [2021-12-27 23:00:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123018 to 109205. [2021-12-27 23:00:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109205 states, 109204 states have (on average 1.1021482729570344) internal successors, (120359), 109204 states have internal predecessors, (120359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:00:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109205 states to 109205 states and 120359 transitions. [2021-12-27 23:00:03,107 INFO L78 Accepts]: Start accepts. Automaton has 109205 states and 120359 transitions. Word has length 643 [2021-12-27 23:00:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:00:03,107 INFO L470 AbstractCegarLoop]: Abstraction has 109205 states and 120359 transitions. [2021-12-27 23:00:03,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 89.2) internal successors, (892), 9 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:00:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 109205 states and 120359 transitions. [2021-12-27 23:00:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-12-27 23:00:03,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:00:03,123 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:00:03,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-27 23:00:03,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:00:03,336 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:00:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:00:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash -685287526, now seen corresponding path program 1 times [2021-12-27 23:00:03,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:00:03,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852054413] [2021-12-27 23:00:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:00:03,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:00:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:00:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-27 23:00:03,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:00:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852054413] [2021-12-27 23:00:03,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852054413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:00:03,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:00:03,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:00:03,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975250556] [2021-12-27 23:00:03,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:00:03,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:00:03,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:00:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:00:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:00:03,525 INFO L87 Difference]: Start difference. First operand 109205 states and 120359 transitions. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)