./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label40.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 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:55:33,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:55:33,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:55:33,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:55:33,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:55:33,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:55:33,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:55:33,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:55:33,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:55:33,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:55:33,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:55:33,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:55:33,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:55:33,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:55:33,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:55:33,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:55:33,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:55:33,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:55:33,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:55:33,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:55:33,466 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:55:33,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:55:33,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:55:33,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:55:33,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:55:33,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:55:33,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:55:33,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:55:33,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:55:33,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:55:33,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:55:33,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:55:33,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:55:33,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:55:33,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:55:33,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:55:33,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:55:33,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:55:33,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:55:33,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:55:33,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:55:33,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:55:33,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:55:33,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:55:33,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:55:33,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:55:33,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:55:33,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:55:33,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:55:33,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:55:33,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:55:33,546 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:55:33,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:55:33,547 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:55:33,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:55:33,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:55:33,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:55:33,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:55:33,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:55:33,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:55:33,548 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:55:33,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:55:33,549 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:55:33,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:55:33,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:55:33,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:55:33,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:55:33,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:55:33,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:55:33,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:55:33,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:55:33,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:55:33,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:55:33,551 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:55:33,551 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:55:33,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:55:33,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b [2022-07-20 23:55:33,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:55:33,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:55:33,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:55:33,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:55:33,867 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:55:33,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2022-07-20 23:55:33,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bfa9a13/c10ceb1289be42c19dc78b686e7596a6/FLAGd7e512fa2 [2022-07-20 23:55:34,682 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:55:34,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2022-07-20 23:55:34,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bfa9a13/c10ceb1289be42c19dc78b686e7596a6/FLAGd7e512fa2 [2022-07-20 23:55:34,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bfa9a13/c10ceb1289be42c19dc78b686e7596a6 [2022-07-20 23:55:34,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:55:34,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:55:34,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:55:34,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:55:34,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:55:34,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:55:34" (1/1) ... [2022-07-20 23:55:34,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7e7ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:34, skipping insertion in model container [2022-07-20 23:55:34,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:55:34" (1/1) ... [2022-07-20 23:55:34,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:55:34,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:55:35,229 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/Problem13_label40.c[4201,4214] [2022-07-20 23:55:36,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:55:36,008 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:55:36,037 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/Problem13_label40.c[4201,4214] [2022-07-20 23:55:36,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:55:36,635 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:55:36,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36 WrapperNode [2022-07-20 23:55:36,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:55:36,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:55:36,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:55:36,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:55:36,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:36,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,376 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-20 23:55:37,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:55:37,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:55:37,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:55:37,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:55:37,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:38,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:55:38,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:55:38,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:55:38,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:55:38,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:38,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:55:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:55:38,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 23:55:38,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 23:55:38,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:55:38,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:55:38,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:55:38,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:55:38,384 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:55:38,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:55:42,957 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:55:42,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:55:42,978 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:55:42,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:55:42 BoogieIcfgContainer [2022-07-20 23:55:42,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:55:42,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:55:42,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:55:42,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:55:42,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:55:34" (1/3) ... [2022-07-20 23:55:42,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6675b46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:55:42, skipping insertion in model container [2022-07-20 23:55:42,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (2/3) ... [2022-07-20 23:55:42,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6675b46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:55:42, skipping insertion in model container [2022-07-20 23:55:42,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:55:42" (3/3) ... [2022-07-20 23:55:42,989 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2022-07-20 23:55:43,001 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:55:43,001 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:55:43,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:55:43,083 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@124f26c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7925982d [2022-07-20 23:55:43,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:55:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 23:55:43,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:43,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:43,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2022-07-20 23:55:43,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:43,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954918822] [2022-07-20 23:55:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:43,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:43,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954918822] [2022-07-20 23:55:43,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954918822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:43,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:43,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232458874] [2022-07-20 23:55:43,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:43,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:43,403 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:47,546 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2022-07-20 23:55:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2022-07-20 23:55:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:47,584 INFO L225 Difference]: With dead ends: 3147 [2022-07-20 23:55:47,584 INFO L226 Difference]: Without dead ends: 1964 [2022-07-20 23:55:47,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:47,598 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 1151 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:47,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-20 23:55:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-07-20 23:55:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2022-07-20 23:55:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2022-07-20 23:55:47,723 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 28 [2022-07-20 23:55:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:47,723 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2022-07-20 23:55:47,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2022-07-20 23:55:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 23:55:47,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:47,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:47,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:55:47,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:47,731 INFO L85 PathProgramCache]: Analyzing trace with hash 215513083, now seen corresponding path program 1 times [2022-07-20 23:55:47,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:47,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754259054] [2022-07-20 23:55:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:47,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:47,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754259054] [2022-07-20 23:55:47,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754259054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:47,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:47,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910174948] [2022-07-20 23:55:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:47,934 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:51,683 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2022-07-20 23:55:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-20 23:55:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:51,702 INFO L225 Difference]: With dead ends: 5542 [2022-07-20 23:55:51,702 INFO L226 Difference]: Without dead ends: 3593 [2022-07-20 23:55:51,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:51,707 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:51,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-20 23:55:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2022-07-20 23:55:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2022-07-20 23:55:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2022-07-20 23:55:51,774 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 99 [2022-07-20 23:55:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:51,776 INFO L495 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2022-07-20 23:55:51,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2022-07-20 23:55:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 23:55:51,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:51,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:51,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:55:51,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1129801848, now seen corresponding path program 1 times [2022-07-20 23:55:51,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:51,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479722619] [2022-07-20 23:55:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:51,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:51,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479722619] [2022-07-20 23:55:51,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479722619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:51,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:51,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:51,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384135250] [2022-07-20 23:55:51,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:51,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:51,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:51,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:51,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:51,919 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:55,169 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2022-07-20 23:55:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-20 23:55:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:55,197 INFO L225 Difference]: With dead ends: 10352 [2022-07-20 23:55:55,197 INFO L226 Difference]: Without dead ends: 6773 [2022-07-20 23:55:55,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:55,205 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 786 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:55,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 1171 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:55:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2022-07-20 23:55:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2022-07-20 23:55:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3255779490219324) internal successors, (8945), 6748 states have internal predecessors, (8945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8945 transitions. [2022-07-20 23:55:55,398 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8945 transitions. Word has length 113 [2022-07-20 23:55:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:55,398 INFO L495 AbstractCegarLoop]: Abstraction has 6749 states and 8945 transitions. [2022-07-20 23:55:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8945 transitions. [2022-07-20 23:55:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 23:55:55,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:55,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:55:55,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1928986802, now seen corresponding path program 1 times [2022-07-20 23:55:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817668229] [2022-07-20 23:55:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:55,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:55,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817668229] [2022-07-20 23:55:55,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817668229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:55,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:55,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742040309] [2022-07-20 23:55:55,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:55,547 INFO L87 Difference]: Start difference. First operand 6749 states and 8945 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:58,657 INFO L93 Difference]: Finished difference Result 19804 states and 26226 transitions. [2022-07-20 23:55:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-20 23:55:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:58,693 INFO L225 Difference]: With dead ends: 19804 [2022-07-20 23:55:58,694 INFO L226 Difference]: Without dead ends: 13057 [2022-07-20 23:55:58,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:58,707 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:58,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:55:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2022-07-20 23:55:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2022-07-20 23:55:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.2182208259903455) internal successors, (15899), 13051 states have internal predecessors, (15899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15899 transitions. [2022-07-20 23:55:58,926 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15899 transitions. Word has length 142 [2022-07-20 23:55:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:58,928 INFO L495 AbstractCegarLoop]: Abstraction has 13052 states and 15899 transitions. [2022-07-20 23:55:58,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15899 transitions. [2022-07-20 23:55:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 23:55:58,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:58,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:58,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:55:58,930 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1888751763, now seen corresponding path program 1 times [2022-07-20 23:55:58,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:58,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125682603] [2022-07-20 23:55:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:58,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125682603] [2022-07-20 23:55:59,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125682603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:59,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:59,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341966052] [2022-07-20 23:55:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:59,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:55:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:55:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:55:59,058 INFO L87 Difference]: Start difference. First operand 13052 states and 15899 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:05,872 INFO L93 Difference]: Finished difference Result 47613 states and 58541 transitions. [2022-07-20 23:56:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:56:05,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2022-07-20 23:56:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:05,947 INFO L225 Difference]: With dead ends: 47613 [2022-07-20 23:56:05,948 INFO L226 Difference]: Without dead ends: 34563 [2022-07-20 23:56:05,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:05,965 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 1651 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 7510 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 8113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 7510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:05,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1300 Invalid, 8113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 7510 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-07-20 23:56:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34563 states. [2022-07-20 23:56:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34563 to 34360. [2022-07-20 23:56:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34360 states, 34359 states have (on average 1.1786431502663057) internal successors, (40497), 34359 states have internal predecessors, (40497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34360 states to 34360 states and 40497 transitions. [2022-07-20 23:56:06,526 INFO L78 Accepts]: Start accepts. Automaton has 34360 states and 40497 transitions. Word has length 153 [2022-07-20 23:56:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:06,528 INFO L495 AbstractCegarLoop]: Abstraction has 34360 states and 40497 transitions. [2022-07-20 23:56:06,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 34360 states and 40497 transitions. [2022-07-20 23:56:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-20 23:56:06,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:06,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 23:56:06,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 245627492, now seen corresponding path program 1 times [2022-07-20 23:56:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050045293] [2022-07-20 23:56:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 23:56:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050045293] [2022-07-20 23:56:06,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050045293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:06,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:06,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234478559] [2022-07-20 23:56:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:06,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:06,660 INFO L87 Difference]: Start difference. First operand 34360 states and 40497 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:09,808 INFO L93 Difference]: Finished difference Result 69505 states and 81794 transitions. [2022-07-20 23:56:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 218 [2022-07-20 23:56:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:09,880 INFO L225 Difference]: With dead ends: 69505 [2022-07-20 23:56:09,880 INFO L226 Difference]: Without dead ends: 35147 [2022-07-20 23:56:09,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:09,905 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:09,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:56:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35147 states. [2022-07-20 23:56:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35147 to 35147. [2022-07-20 23:56:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35147 states, 35146 states have (on average 1.1747851818130086) internal successors, (41289), 35146 states have internal predecessors, (41289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35147 states to 35147 states and 41289 transitions. [2022-07-20 23:56:10,422 INFO L78 Accepts]: Start accepts. Automaton has 35147 states and 41289 transitions. Word has length 218 [2022-07-20 23:56:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:10,423 INFO L495 AbstractCegarLoop]: Abstraction has 35147 states and 41289 transitions. [2022-07-20 23:56:10,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35147 states and 41289 transitions. [2022-07-20 23:56:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-20 23:56:10,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:10,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:56:10,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:56:10,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash 518295855, now seen corresponding path program 1 times [2022-07-20 23:56:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:10,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222371830] [2022-07-20 23:56:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:10,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222371830] [2022-07-20 23:56:10,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222371830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:10,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:10,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439411545] [2022-07-20 23:56:10,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:56:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:56:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:10,572 INFO L87 Difference]: Start difference. First operand 35147 states and 41289 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:17,123 INFO L93 Difference]: Finished difference Result 94992 states and 112854 transitions. [2022-07-20 23:56:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:56:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2022-07-20 23:56:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:17,202 INFO L225 Difference]: With dead ends: 94992 [2022-07-20 23:56:17,202 INFO L226 Difference]: Without dead ends: 60634 [2022-07-20 23:56:17,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:17,232 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 1741 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 6170 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 6170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:17,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 840 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 6170 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-20 23:56:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60634 states. [2022-07-20 23:56:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60634 to 60455. [2022-07-20 23:56:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60455 states, 60454 states have (on average 1.1679624177060244) internal successors, (70608), 60454 states have internal predecessors, (70608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60455 states to 60455 states and 70608 transitions. [2022-07-20 23:56:18,146 INFO L78 Accepts]: Start accepts. Automaton has 60455 states and 70608 transitions. Word has length 225 [2022-07-20 23:56:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:18,146 INFO L495 AbstractCegarLoop]: Abstraction has 60455 states and 70608 transitions. [2022-07-20 23:56:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 60455 states and 70608 transitions. [2022-07-20 23:56:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 23:56:18,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:18,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:56:18,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:56:18,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1054166602, now seen corresponding path program 1 times [2022-07-20 23:56:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:18,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758558823] [2022-07-20 23:56:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:18,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758558823] [2022-07-20 23:56:18,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758558823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:18,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:18,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669712008] [2022-07-20 23:56:18,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:18,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:18,269 INFO L87 Difference]: Start difference. First operand 60455 states and 70608 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) [2022-07-20 23:56:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:21,742 INFO L93 Difference]: Finished difference Result 146103 states and 173484 transitions. [2022-07-20 23:56:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:21,743 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 235 [2022-07-20 23:56:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:21,864 INFO L225 Difference]: With dead ends: 146103 [2022-07-20 23:56:21,864 INFO L226 Difference]: Without dead ends: 86437 [2022-07-20 23:56:21,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:21,912 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 811 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:21,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 1083 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:56:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86437 states. [2022-07-20 23:56:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86437 to 84851. [2022-07-20 23:56:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84851 states, 84850 states have (on average 1.1580907483794933) internal successors, (98264), 84850 states have internal predecessors, (98264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84851 states to 84851 states and 98264 transitions. [2022-07-20 23:56:23,555 INFO L78 Accepts]: Start accepts. Automaton has 84851 states and 98264 transitions. Word has length 235 [2022-07-20 23:56:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:23,556 INFO L495 AbstractCegarLoop]: Abstraction has 84851 states and 98264 transitions. [2022-07-20 23:56:23,557 INFO L496 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) [2022-07-20 23:56:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 84851 states and 98264 transitions. [2022-07-20 23:56:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-20 23:56:23,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:23,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:56:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:56:23,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash 945283299, now seen corresponding path program 1 times [2022-07-20 23:56:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:23,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619943065] [2022-07-20 23:56:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619943065] [2022-07-20 23:56:23,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619943065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:23,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:23,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:23,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032826424] [2022-07-20 23:56:23,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:23,683 INFO L87 Difference]: Start difference. First operand 84851 states and 98264 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:27,099 INFO L93 Difference]: Finished difference Result 166365 states and 192910 transitions. [2022-07-20 23:56:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2022-07-20 23:56:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:27,202 INFO L225 Difference]: With dead ends: 166365 [2022-07-20 23:56:27,202 INFO L226 Difference]: Without dead ends: 82303 [2022-07-20 23:56:27,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:27,237 INFO L413 NwaCegarLoop]: 1512 mSDtfsCounter, 1036 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:27,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1648 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:56:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82303 states. [2022-07-20 23:56:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82303 to 75995. [2022-07-20 23:56:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75995 states, 75994 states have (on average 1.1166802642313867) internal successors, (84861), 75994 states have internal predecessors, (84861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75995 states to 75995 states and 84861 transitions. [2022-07-20 23:56:28,186 INFO L78 Accepts]: Start accepts. Automaton has 75995 states and 84861 transitions. Word has length 242 [2022-07-20 23:56:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:28,186 INFO L495 AbstractCegarLoop]: Abstraction has 75995 states and 84861 transitions. [2022-07-20 23:56:28,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 75995 states and 84861 transitions. [2022-07-20 23:56:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-20 23:56:28,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:28,191 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:28,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:56:28,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1755959963, now seen corresponding path program 1 times [2022-07-20 23:56:28,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:28,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399209263] [2022-07-20 23:56:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:28,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-20 23:56:28,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:28,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399209263] [2022-07-20 23:56:28,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399209263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:28,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:28,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:28,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483978110] [2022-07-20 23:56:28,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:28,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:28,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:28,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:28,325 INFO L87 Difference]: Start difference. First operand 75995 states and 84861 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:31,939 INFO L93 Difference]: Finished difference Result 153566 states and 171314 transitions. [2022-07-20 23:56:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 314 [2022-07-20 23:56:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:32,079 INFO L225 Difference]: With dead ends: 153566 [2022-07-20 23:56:32,080 INFO L226 Difference]: Without dead ends: 78360 [2022-07-20 23:56:32,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:32,115 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 939 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:32,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 1477 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:56:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78360 states. [2022-07-20 23:56:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78360 to 75988. [2022-07-20 23:56:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75988 states, 75987 states have (on average 1.0957400607998737) internal successors, (83262), 75987 states have internal predecessors, (83262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75988 states to 75988 states and 83262 transitions. [2022-07-20 23:56:33,016 INFO L78 Accepts]: Start accepts. Automaton has 75988 states and 83262 transitions. Word has length 314 [2022-07-20 23:56:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:33,016 INFO L495 AbstractCegarLoop]: Abstraction has 75988 states and 83262 transitions. [2022-07-20 23:56:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75988 states and 83262 transitions. [2022-07-20 23:56:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-20 23:56:33,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:33,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:56:33,021 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -444136852, now seen corresponding path program 1 times [2022-07-20 23:56:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513202545] [2022-07-20 23:56:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-20 23:56:33,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:33,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513202545] [2022-07-20 23:56:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513202545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:33,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:33,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566407631] [2022-07-20 23:56:33,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:33,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:33,180 INFO L87 Difference]: Start difference. First operand 75988 states and 83262 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:36,735 INFO L93 Difference]: Finished difference Result 173236 states and 190620 transitions. [2022-07-20 23:56:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 324 [2022-07-20 23:56:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:36,913 INFO L225 Difference]: With dead ends: 173236 [2022-07-20 23:56:36,913 INFO L226 Difference]: Without dead ends: 98037 [2022-07-20 23:56:36,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:36,961 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 894 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:36,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 846 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:56:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98037 states. [2022-07-20 23:56:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98037 to 96447. [2022-07-20 23:56:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96447 states, 96446 states have (on average 1.0905791842067063) internal successors, (105182), 96446 states have internal predecessors, (105182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96447 states to 96447 states and 105182 transitions. [2022-07-20 23:56:38,204 INFO L78 Accepts]: Start accepts. Automaton has 96447 states and 105182 transitions. Word has length 324 [2022-07-20 23:56:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:38,204 INFO L495 AbstractCegarLoop]: Abstraction has 96447 states and 105182 transitions. [2022-07-20 23:56:38,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 96447 states and 105182 transitions. [2022-07-20 23:56:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-07-20 23:56:38,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:38,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:38,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 23:56:38,209 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1192441845, now seen corresponding path program 1 times [2022-07-20 23:56:38,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908825225] [2022-07-20 23:56:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 23:56:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:38,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908825225] [2022-07-20 23:56:38,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908825225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:38,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:38,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394952053] [2022-07-20 23:56:38,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:38,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:38,625 INFO L87 Difference]: Start difference. First operand 96447 states and 105182 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 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) [2022-07-20 23:56:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:42,220 INFO L93 Difference]: Finished difference Result 209437 states and 227970 transitions. [2022-07-20 23:56:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 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 341 [2022-07-20 23:56:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:42,366 INFO L225 Difference]: With dead ends: 209437 [2022-07-20 23:56:42,366 INFO L226 Difference]: Without dead ends: 113779 [2022-07-20 23:56:42,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:42,403 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 724 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:42,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1197 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:56:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113779 states. [2022-07-20 23:56:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113779 to 112982. [2022-07-20 23:56:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112982 states, 112981 states have (on average 1.081836769014259) internal successors, (122227), 112981 states have internal predecessors, (122227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112982 states to 112982 states and 122227 transitions. [2022-07-20 23:56:43,856 INFO L78 Accepts]: Start accepts. Automaton has 112982 states and 122227 transitions. Word has length 341 [2022-07-20 23:56:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:43,856 INFO L495 AbstractCegarLoop]: Abstraction has 112982 states and 122227 transitions. [2022-07-20 23:56:43,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 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) [2022-07-20 23:56:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 112982 states and 122227 transitions. [2022-07-20 23:56:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-07-20 23:56:43,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:43,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:43,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:56:43,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1539895112, now seen corresponding path program 1 times [2022-07-20 23:56:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:43,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969255080] [2022-07-20 23:56:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:56:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:44,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969255080] [2022-07-20 23:56:44,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969255080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:44,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:44,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348468646] [2022-07-20 23:56:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:56:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:56:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:44,047 INFO L87 Difference]: Start difference. First operand 112982 states and 122227 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:50,105 INFO L93 Difference]: Finished difference Result 274832 states and 300813 transitions. [2022-07-20 23:56:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:56:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 355 [2022-07-20 23:56:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:50,337 INFO L225 Difference]: With dead ends: 274832 [2022-07-20 23:56:50,338 INFO L226 Difference]: Without dead ends: 179174 [2022-07-20 23:56:50,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:50,397 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 1638 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5280 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 6091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 5280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:50,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 947 Invalid, 6091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 5280 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-20 23:56:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179174 states. [2022-07-20 23:56:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179174 to 178336. [2022-07-20 23:56:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178336 states, 178335 states have (on average 1.0821655872375024) internal successors, (192988), 178335 states have internal predecessors, (192988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178336 states to 178336 states and 192988 transitions. [2022-07-20 23:56:53,067 INFO L78 Accepts]: Start accepts. Automaton has 178336 states and 192988 transitions. Word has length 355 [2022-07-20 23:56:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:53,068 INFO L495 AbstractCegarLoop]: Abstraction has 178336 states and 192988 transitions. [2022-07-20 23:56:53,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 178336 states and 192988 transitions. [2022-07-20 23:56:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-20 23:56:53,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:53,072 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-20 23:56:53,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:56:53,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2088568846, now seen corresponding path program 1 times [2022-07-20 23:56:53,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:53,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395517840] [2022-07-20 23:56:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:53,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-20 23:56:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395517840] [2022-07-20 23:56:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395517840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:53,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:53,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766978240] [2022-07-20 23:56:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:53,201 INFO L87 Difference]: Start difference. First operand 178336 states and 192988 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:56,790 INFO L93 Difference]: Finished difference Result 359058 states and 388375 transitions. [2022-07-20 23:56:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:56,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2022-07-20 23:56:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:57,038 INFO L225 Difference]: With dead ends: 359058 [2022-07-20 23:56:57,038 INFO L226 Difference]: Without dead ends: 180724 [2022-07-20 23:56:57,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:57,495 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 1087 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:57,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 1323 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:56:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180724 states. [2022-07-20 23:56:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180724 to 175184. [2022-07-20 23:56:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175184 states, 175183 states have (on average 1.077952769389724) internal successors, (188839), 175183 states have internal predecessors, (188839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175184 states to 175184 states and 188839 transitions. [2022-07-20 23:56:59,889 INFO L78 Accepts]: Start accepts. Automaton has 175184 states and 188839 transitions. Word has length 357 [2022-07-20 23:56:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:59,889 INFO L495 AbstractCegarLoop]: Abstraction has 175184 states and 188839 transitions. [2022-07-20 23:56:59,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 175184 states and 188839 transitions. [2022-07-20 23:56:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-07-20 23:56:59,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:59,894 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:59,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:56:59,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 221236577, now seen corresponding path program 1 times [2022-07-20 23:56:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898618152] [2022-07-20 23:56:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:59,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 252 proven. 113 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 23:57:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898618152] [2022-07-20 23:57:00,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898618152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571560855] [2022-07-20 23:57:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:00,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:00,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:00,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:57:00,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:57:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:00,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:57:00,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 23:57:00,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:00,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571560855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:00,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:00,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:57:00,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477728388] [2022-07-20 23:57:00,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:00,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:00,502 INFO L87 Difference]: Start difference. First operand 175184 states and 188839 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:04,230 INFO L93 Difference]: Finished difference Result 347216 states and 374217 transitions. [2022-07-20 23:57:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 370 [2022-07-20 23:57:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:04,456 INFO L225 Difference]: With dead ends: 347216 [2022-07-20 23:57:04,456 INFO L226 Difference]: Without dead ends: 172821 [2022-07-20 23:57:04,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:04,541 INFO L413 NwaCegarLoop]: 1337 mSDtfsCounter, 1094 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:04,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1416 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:57:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172821 states. [2022-07-20 23:57:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172821 to 171241. [2022-07-20 23:57:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171241 states, 171240 states have (on average 1.0590983415089932) internal successors, (181360), 171240 states have internal predecessors, (181360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171241 states to 171241 states and 181360 transitions. [2022-07-20 23:57:06,912 INFO L78 Accepts]: Start accepts. Automaton has 171241 states and 181360 transitions. Word has length 370 [2022-07-20 23:57:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:06,912 INFO L495 AbstractCegarLoop]: Abstraction has 171241 states and 181360 transitions. [2022-07-20 23:57:06,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 171241 states and 181360 transitions. [2022-07-20 23:57:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-07-20 23:57:06,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:06,916 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:57:06,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:57:07,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 23:57:07,117 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1276482095, now seen corresponding path program 1 times [2022-07-20 23:57:07,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35652083] [2022-07-20 23:57:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-20 23:57:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35652083] [2022-07-20 23:57:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35652083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:07,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:57:07,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 23:57:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38979574] [2022-07-20 23:57:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:07,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:57:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:57:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:57:07,709 INFO L87 Difference]: Start difference. First operand 171241 states and 181360 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:13,886 INFO L93 Difference]: Finished difference Result 416606 states and 443063 transitions. [2022-07-20 23:57:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:57:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 383 [2022-07-20 23:57:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:14,234 INFO L225 Difference]: With dead ends: 416606 [2022-07-20 23:57:14,234 INFO L226 Difference]: Without dead ends: 261900 [2022-07-20 23:57:14,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:57:14,320 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1936 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 6261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:14,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1936 Valid, 785 Invalid, 6261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 4946 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-20 23:57:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261900 states. [2022-07-20 23:57:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261900 to 250860. [2022-07-20 23:57:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250860 states, 250859 states have (on average 1.0575901203464895) internal successors, (265306), 250859 states have internal predecessors, (265306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250860 states to 250860 states and 265306 transitions. [2022-07-20 23:57:17,973 INFO L78 Accepts]: Start accepts. Automaton has 250860 states and 265306 transitions. Word has length 383 [2022-07-20 23:57:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 250860 states and 265306 transitions. [2022-07-20 23:57:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 250860 states and 265306 transitions. [2022-07-20 23:57:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-07-20 23:57:17,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:17,978 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-07-20 23:57:17,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 23:57:17,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:17,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1925406683, now seen corresponding path program 1 times [2022-07-20 23:57:17,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:17,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988412462] [2022-07-20 23:57:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 355 proven. 113 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-20 23:57:18,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988412462] [2022-07-20 23:57:18,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988412462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665759736] [2022-07-20 23:57:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:18,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:57:18,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:57:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:57:18,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-20 23:57:19,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:19,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665759736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:19,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:19,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-20 23:57:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723244298] [2022-07-20 23:57:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:19,475 INFO L87 Difference]: Start difference. First operand 250860 states and 265306 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)