./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_label10.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 70e3fa314440413ee6566d40ce0ee11aff48ac01f98d0bf277ed2b1e7bf71005 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:36:53,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:36:53,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:36:53,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:36:53,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:36:53,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:36:53,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:36:53,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:36:53,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:36:53,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:36:53,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:36:53,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:36:53,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:36:53,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:36:53,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:36:53,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:36:53,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:36:53,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:36:53,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:36:53,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:36:53,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:36:53,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:36:53,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:36:53,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:36:53,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:36:53,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:36:53,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:36:53,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:36:53,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:36:53,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:36:53,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:36:53,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:36:53,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:36:53,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:36:53,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:36:53,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:36:53,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:36:53,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:36:53,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:36:53,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:36:53,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:36:53,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:36:53,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:36:53,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:36:53,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:36:53,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:36:53,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:36:53,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:36:53,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:36:53,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:36:53,517 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:36:53,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:36:53,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:36:53,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:36:53,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:36:53,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:36:53,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:36:53,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:36:53,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:36:53,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:36:53,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:36:53,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:36:53,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:36:53,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:36:53,520 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:36:53,520 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:36:53,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:36:53,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:36:53,521 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70e3fa314440413ee6566d40ce0ee11aff48ac01f98d0bf277ed2b1e7bf71005 [2021-12-17 04:36:53,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:36:53,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:36:53,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:36:53,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:36:53,752 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:36:53,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label10.c [2021-12-17 04:36:53,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3385c23e2/5b53d04a30554337b1dedb66228c1f40/FLAG87d57a17f [2021-12-17 04:36:54,414 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:36:54,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label10.c [2021-12-17 04:36:54,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3385c23e2/5b53d04a30554337b1dedb66228c1f40/FLAG87d57a17f [2021-12-17 04:36:54,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3385c23e2/5b53d04a30554337b1dedb66228c1f40 [2021-12-17 04:36:54,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:36:54,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:36:54,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:36:54,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:36:54,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:36:54,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:36:54" (1/1) ... [2021-12-17 04:36:54,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5c07ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:54, skipping insertion in model container [2021-12-17 04:36:54,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:36:54" (1/1) ... [2021-12-17 04:36:54,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:36:54,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:36:54,885 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_label10.c[6726,6739] [2021-12-17 04:36:55,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:36:55,516 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:36:55,540 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_label10.c[6726,6739] [2021-12-17 04:36:55,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:36:55,942 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:36:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55 WrapperNode [2021-12-17 04:36:55,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:36:55,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:36:55,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:36:55,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:36:55,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,560 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:36:56,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:36:56,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:36:56,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:36:56,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:36:56,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:56,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:57,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:36:57,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:36:57,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:36:57,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:36:57,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (1/1) ... [2021-12-17 04:36:57,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:36:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:36:57,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 04:36:57,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 04:36:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:36:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:36:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:36:57,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:36:57,203 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:36:57,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:37:00,380 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:37:00,390 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:37:00,391 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:37:00,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:00 BoogieIcfgContainer [2021-12-17 04:37:00,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:37:00,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:37:00,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:37:00,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:37:00,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:36:54" (1/3) ... [2021-12-17 04:37:00,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edcfbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:00, skipping insertion in model container [2021-12-17 04:37:00,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:36:55" (2/3) ... [2021-12-17 04:37:00,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edcfbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:00, skipping insertion in model container [2021-12-17 04:37:00,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:00" (3/3) ... [2021-12-17 04:37:00,400 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label10.c [2021-12-17 04:37:00,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:37:00,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:37:00,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:37:00,443 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 04:37:00,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:37:00,464 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) [2021-12-17 04:37:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 04:37:00,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:00,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:00,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2021-12-17 04:37:00,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117253622] [2021-12-17 04:37:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:00,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:00,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117253622] [2021-12-17 04:37:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117253622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:00,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:00,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:00,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867659342] [2021-12-17 04:37:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:00,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:00,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:00,658 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 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:03,767 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-17 04:37:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-17 04:37:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:03,791 INFO L225 Difference]: With dead ends: 3035 [2021-12-17 04:37:03,792 INFO L226 Difference]: Without dead ends: 1873 [2021-12-17 04:37:03,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:03,802 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 858 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:03,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:37:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-17 04:37:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-17 04:37:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-17 04:37:03,904 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 47 [2021-12-17 04:37:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:03,904 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-17 04:37:03,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-17 04:37:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 04:37:03,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:03,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:03,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:37:03,912 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash 494461477, now seen corresponding path program 1 times [2021-12-17 04:37:03,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:03,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413334175] [2021-12-17 04:37:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:03,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:04,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413334175] [2021-12-17 04:37:04,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413334175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:04,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:04,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:04,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348587709] [2021-12-17 04:37:04,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:04,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:04,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:04,078 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:07,348 INFO L93 Difference]: Finished difference Result 5405 states and 8404 transitions. [2021-12-17 04:37:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:07,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-17 04:37:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:07,359 INFO L225 Difference]: With dead ends: 5405 [2021-12-17 04:37:07,359 INFO L226 Difference]: Without dead ends: 3548 [2021-12-17 04:37:07,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:07,364 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 862 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:07,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1040 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:37:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-12-17 04:37:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3476. [2021-12-17 04:37:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 1.4897841726618706) internal successors, (5177), 3475 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 5177 transitions. [2021-12-17 04:37:07,412 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 5177 transitions. Word has length 119 [2021-12-17 04:37:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:07,414 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 5177 transitions. [2021-12-17 04:37:07,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 5177 transitions. [2021-12-17 04:37:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 04:37:07,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:07,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:07,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:37:07,423 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1650512586, now seen corresponding path program 1 times [2021-12-17 04:37:07,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:07,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373648047] [2021-12-17 04:37:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:07,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:07,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373648047] [2021-12-17 04:37:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373648047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:07,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:07,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:07,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228484486] [2021-12-17 04:37:07,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:07,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:07,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:07,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:07,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:07,544 INFO L87 Difference]: Start difference. First operand 3476 states and 5177 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:10,467 INFO L93 Difference]: Finished difference Result 10140 states and 15128 transitions. [2021-12-17 04:37:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-17 04:37:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:10,494 INFO L225 Difference]: With dead ends: 10140 [2021-12-17 04:37:10,494 INFO L226 Difference]: Without dead ends: 6666 [2021-12-17 04:37:10,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:10,503 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 962 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:10,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 849 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:37:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-12-17 04:37:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 6659. [2021-12-17 04:37:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 1.364373685791529) internal successors, (9084), 6658 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 9084 transitions. [2021-12-17 04:37:10,589 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 9084 transitions. Word has length 133 [2021-12-17 04:37:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:10,590 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 9084 transitions. [2021-12-17 04:37:10,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 9084 transitions. [2021-12-17 04:37:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 04:37:10,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:10,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:10,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:37:10,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:10,592 INFO L85 PathProgramCache]: Analyzing trace with hash -69142778, now seen corresponding path program 1 times [2021-12-17 04:37:10,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:10,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26386497] [2021-12-17 04:37:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:10,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:10,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26386497] [2021-12-17 04:37:10,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26386497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:10,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:10,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:10,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917847484] [2021-12-17 04:37:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:10,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:10,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:10,669 INFO L87 Difference]: Start difference. First operand 6659 states and 9084 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:13,240 INFO L93 Difference]: Finished difference Result 14110 states and 19030 transitions. [2021-12-17 04:37:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-17 04:37:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:13,285 INFO L225 Difference]: With dead ends: 14110 [2021-12-17 04:37:13,286 INFO L226 Difference]: Without dead ends: 7453 [2021-12-17 04:37:13,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:13,299 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 707 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:13,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 1176 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:37:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2021-12-17 04:37:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 7446. [2021-12-17 04:37:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7446 states, 7445 states have (on average 1.3305574210879785) internal successors, (9906), 7445 states have internal predecessors, (9906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7446 states to 7446 states and 9906 transitions. [2021-12-17 04:37:13,394 INFO L78 Accepts]: Start accepts. Automaton has 7446 states and 9906 transitions. Word has length 136 [2021-12-17 04:37:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:13,395 INFO L470 AbstractCegarLoop]: Abstraction has 7446 states and 9906 transitions. [2021-12-17 04:37:13,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7446 states and 9906 transitions. [2021-12-17 04:37:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 04:37:13,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:13,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:13,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:37:13,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 374657135, now seen corresponding path program 1 times [2021-12-17 04:37:13,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:13,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421696476] [2021-12-17 04:37:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:13,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:13,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421696476] [2021-12-17 04:37:13,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421696476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:13,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:13,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:13,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823553142] [2021-12-17 04:37:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:13,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:13,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:13,477 INFO L87 Difference]: Start difference. First operand 7446 states and 9906 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:15,663 INFO L93 Difference]: Finished difference Result 17275 states and 24000 transitions. [2021-12-17 04:37:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:15,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-12-17 04:37:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:15,694 INFO L225 Difference]: With dead ends: 17275 [2021-12-17 04:37:15,695 INFO L226 Difference]: Without dead ends: 10618 [2021-12-17 04:37:15,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:15,703 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 910 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:15,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 1000 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:37:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2021-12-17 04:37:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 10608. [2021-12-17 04:37:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3126237390402564) internal successors, (13923), 10607 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 13923 transitions. [2021-12-17 04:37:15,848 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 13923 transitions. Word has length 143 [2021-12-17 04:37:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:15,848 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 13923 transitions. [2021-12-17 04:37:15,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 13923 transitions. [2021-12-17 04:37:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 04:37:15,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:15,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:15,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:37:15,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1815303182, now seen corresponding path program 1 times [2021-12-17 04:37:15,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:15,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274187414] [2021-12-17 04:37:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:15,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:15,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274187414] [2021-12-17 04:37:15,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274187414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:15,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:15,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:37:15,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650272065] [2021-12-17 04:37:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:15,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 04:37:15,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 04:37:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:37:16,000 INFO L87 Difference]: Start difference. First operand 10608 states and 13923 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:19,789 INFO L93 Difference]: Finished difference Result 20468 states and 27063 transitions. [2021-12-17 04:37:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:37:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-17 04:37:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:19,805 INFO L225 Difference]: With dead ends: 20468 [2021-12-17 04:37:19,806 INFO L226 Difference]: Without dead ends: 10649 [2021-12-17 04:37:19,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:19,816 INFO L933 BasicCegarLoop]: 1095 mSDtfsCounter, 2252 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2252 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 4804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2252 Valid, 2644 Invalid, 4804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:37:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10649 states. [2021-12-17 04:37:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10649 to 10608. [2021-12-17 04:37:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3097954181201095) internal successors, (13893), 10607 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 13893 transitions. [2021-12-17 04:37:19,936 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 13893 transitions. Word has length 152 [2021-12-17 04:37:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:19,936 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 13893 transitions. [2021-12-17 04:37:19,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 13893 transitions. [2021-12-17 04:37:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-17 04:37:19,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:19,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:37:19,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:37:19,939 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash 539220364, now seen corresponding path program 1 times [2021-12-17 04:37:19,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748270660] [2021-12-17 04:37:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:19,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 89 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 04:37:20,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:20,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748270660] [2021-12-17 04:37:20,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748270660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:37:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052801141] [2021-12-17 04:37:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:20,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:20,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:20,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:37:20,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:37:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:37:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:37:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 04:37:20,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:37:20,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052801141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:20,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:37:20,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 04:37:20,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821266103] [2021-12-17 04:37:20,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:37:20,449 INFO L87 Difference]: Start difference. First operand 10608 states and 13893 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:23,732 INFO L93 Difference]: Finished difference Result 30035 states and 39824 transitions. [2021-12-17 04:37:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:23,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 208 [2021-12-17 04:37:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:23,778 INFO L225 Difference]: With dead ends: 30035 [2021-12-17 04:37:23,778 INFO L226 Difference]: Without dead ends: 20216 [2021-12-17 04:37:23,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:37:23,792 INFO L933 BasicCegarLoop]: 1136 mSDtfsCounter, 1053 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:23,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1356 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:37:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20216 states. [2021-12-17 04:37:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20216 to 20199. [2021-12-17 04:37:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20199 states, 20198 states have (on average 1.2510644618279037) internal successors, (25269), 20198 states have internal predecessors, (25269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20199 states to 20199 states and 25269 transitions. [2021-12-17 04:37:24,026 INFO L78 Accepts]: Start accepts. Automaton has 20199 states and 25269 transitions. Word has length 208 [2021-12-17 04:37:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:24,027 INFO L470 AbstractCegarLoop]: Abstraction has 20199 states and 25269 transitions. [2021-12-17 04:37:24,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 20199 states and 25269 transitions. [2021-12-17 04:37:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-17 04:37:24,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:24,029 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:37:24,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:37:24,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:24,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1248857154, now seen corresponding path program 1 times [2021-12-17 04:37:24,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:24,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753008422] [2021-12-17 04:37:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:24,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:37:24,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:24,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753008422] [2021-12-17 04:37:24,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753008422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:24,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:24,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:24,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984378291] [2021-12-17 04:37:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:24,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:24,323 INFO L87 Difference]: Start difference. First operand 20199 states and 25269 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:27,435 INFO L93 Difference]: Finished difference Result 58495 states and 73513 transitions. [2021-12-17 04:37:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 228 [2021-12-17 04:37:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:27,485 INFO L225 Difference]: With dead ends: 58495 [2021-12-17 04:37:27,485 INFO L226 Difference]: Without dead ends: 39085 [2021-12-17 04:37:27,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:27,501 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 884 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:27,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1014 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:37:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39085 states. [2021-12-17 04:37:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39085 to 35930. [2021-12-17 04:37:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35930 states, 35929 states have (on average 1.1822761557516213) internal successors, (42478), 35929 states have internal predecessors, (42478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42478 transitions. [2021-12-17 04:37:27,836 INFO L78 Accepts]: Start accepts. Automaton has 35930 states and 42478 transitions. Word has length 228 [2021-12-17 04:37:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:27,836 INFO L470 AbstractCegarLoop]: Abstraction has 35930 states and 42478 transitions. [2021-12-17 04:37:27,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 35930 states and 42478 transitions. [2021-12-17 04:37:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-17 04:37:27,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:27,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:37:27,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:37:27,839 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash 715278160, now seen corresponding path program 1 times [2021-12-17 04:37:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:27,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179794090] [2021-12-17 04:37:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:27,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:27,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179794090] [2021-12-17 04:37:27,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179794090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:27,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:27,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:27,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591433923] [2021-12-17 04:37:27,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:27,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:27,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:27,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:27,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:27,912 INFO L87 Difference]: Start difference. First operand 35930 states and 42478 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:30,686 INFO L93 Difference]: Finished difference Result 70920 states and 83955 transitions. [2021-12-17 04:37:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-12-17 04:37:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:30,728 INFO L225 Difference]: With dead ends: 70920 [2021-12-17 04:37:30,729 INFO L226 Difference]: Without dead ends: 35779 [2021-12-17 04:37:30,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:30,756 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:30,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:37:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2021-12-17 04:37:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34201. [2021-12-17 04:37:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34201 states, 34200 states have (on average 1.1295906432748537) internal successors, (38632), 34200 states have internal predecessors, (38632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34201 states to 34201 states and 38632 transitions. [2021-12-17 04:37:31,064 INFO L78 Accepts]: Start accepts. Automaton has 34201 states and 38632 transitions. Word has length 261 [2021-12-17 04:37:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:31,064 INFO L470 AbstractCegarLoop]: Abstraction has 34201 states and 38632 transitions. [2021-12-17 04:37:31,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 34201 states and 38632 transitions. [2021-12-17 04:37:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-17 04:37:31,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:31,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:37:31,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:37:31,070 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1687890830, now seen corresponding path program 1 times [2021-12-17 04:37:31,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:31,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903959352] [2021-12-17 04:37:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:31,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:37:31,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903959352] [2021-12-17 04:37:31,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903959352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:31,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:31,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:31,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529291592] [2021-12-17 04:37:31,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:31,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:31,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:31,150 INFO L87 Difference]: Start difference. First operand 34201 states and 38632 transitions. Second operand has 3 states, 3 states have (on average 51.0) 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) [2021-12-17 04:37:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:34,273 INFO L93 Difference]: Finished difference Result 80213 states and 91539 transitions. [2021-12-17 04:37:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) 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 335 [2021-12-17 04:37:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:34,327 INFO L225 Difference]: With dead ends: 80213 [2021-12-17 04:37:34,327 INFO L226 Difference]: Without dead ends: 46801 [2021-12-17 04:37:34,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:34,352 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 821 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:34,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1918 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:37:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46801 states. [2021-12-17 04:37:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46801 to 45221. [2021-12-17 04:37:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45221 states, 45220 states have (on average 1.1134011499336576) internal successors, (50348), 45220 states have internal predecessors, (50348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45221 states to 45221 states and 50348 transitions. [2021-12-17 04:37:34,751 INFO L78 Accepts]: Start accepts. Automaton has 45221 states and 50348 transitions. Word has length 335 [2021-12-17 04:37:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:34,751 INFO L470 AbstractCegarLoop]: Abstraction has 45221 states and 50348 transitions. [2021-12-17 04:37:34,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) 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) [2021-12-17 04:37:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 45221 states and 50348 transitions. [2021-12-17 04:37:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-17 04:37:34,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:34,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:37:34,757 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1979168850, now seen corresponding path program 1 times [2021-12-17 04:37:34,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:34,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365484334] [2021-12-17 04:37:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:34,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 04:37:34,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:34,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365484334] [2021-12-17 04:37:34,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365484334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:34,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:34,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:34,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460905263] [2021-12-17 04:37:34,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:34,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:37:34,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:34,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:37:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:37:34,846 INFO L87 Difference]: Start difference. First operand 45221 states and 50348 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:40,954 INFO L93 Difference]: Finished difference Result 132351 states and 147652 transitions. [2021-12-17 04:37:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:37:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 344 [2021-12-17 04:37:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:41,048 INFO L225 Difference]: With dead ends: 132351 [2021-12-17 04:37:41,049 INFO L226 Difference]: Without dead ends: 87919 [2021-12-17 04:37:41,073 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:41,074 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 1708 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 6628 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 7667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 6628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:41,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 802 Invalid, 7667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 6628 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 04:37:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87919 states. [2021-12-17 04:37:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87919 to 85435. [2021-12-17 04:37:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85435 states, 85434 states have (on average 1.105180607252382) internal successors, (94420), 85434 states have internal predecessors, (94420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85435 states to 85435 states and 94420 transitions. [2021-12-17 04:37:42,139 INFO L78 Accepts]: Start accepts. Automaton has 85435 states and 94420 transitions. Word has length 344 [2021-12-17 04:37:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:42,140 INFO L470 AbstractCegarLoop]: Abstraction has 85435 states and 94420 transitions. [2021-12-17 04:37:42,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 85435 states and 94420 transitions. [2021-12-17 04:37:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-17 04:37:42,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:42,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:42,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:37:42,146 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash -481772957, now seen corresponding path program 1 times [2021-12-17 04:37:42,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:42,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477387300] [2021-12-17 04:37:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:42,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 04:37:42,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477387300] [2021-12-17 04:37:42,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477387300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:42,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:42,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:42,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881272248] [2021-12-17 04:37:42,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:42,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:42,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:42,442 INFO L87 Difference]: Start difference. First operand 85435 states and 94420 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:45,604 INFO L93 Difference]: Finished difference Result 172477 states and 190486 transitions. [2021-12-17 04:37:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:45,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 344 [2021-12-17 04:37:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:45,694 INFO L225 Difference]: With dead ends: 172477 [2021-12-17 04:37:45,694 INFO L226 Difference]: Without dead ends: 86252 [2021-12-17 04:37:45,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:45,729 INFO L933 BasicCegarLoop]: 1825 mSDtfsCounter, 746 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:45,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1964 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:37:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86252 states. [2021-12-17 04:37:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86252 to 85429. [2021-12-17 04:37:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85429 states, 85428 states have (on average 1.0946996300978602) internal successors, (93518), 85428 states have internal predecessors, (93518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85429 states to 85429 states and 93518 transitions. [2021-12-17 04:37:46,803 INFO L78 Accepts]: Start accepts. Automaton has 85429 states and 93518 transitions. Word has length 344 [2021-12-17 04:37:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:46,804 INFO L470 AbstractCegarLoop]: Abstraction has 85429 states and 93518 transitions. [2021-12-17 04:37:46,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 85429 states and 93518 transitions. [2021-12-17 04:37:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-17 04:37:46,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:46,809 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:46,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:37:46,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1384889835, now seen corresponding path program 1 times [2021-12-17 04:37:46,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:46,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013525259] [2021-12-17 04:37:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:46,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 261 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 04:37:46,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:46,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013525259] [2021-12-17 04:37:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013525259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:37:46,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086830838] [2021-12-17 04:37:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:46,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:46,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:46,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:37:46,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:37:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:47,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:37:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:37:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-17 04:37:47,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:37:47,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086830838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:47,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:37:47,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:37:47,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218935082] [2021-12-17 04:37:47,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:47,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:47,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:47,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:47,681 INFO L87 Difference]: Start difference. First operand 85429 states and 93518 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:50,777 INFO L93 Difference]: Finished difference Result 170067 states and 186241 transitions. [2021-12-17 04:37:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 373 [2021-12-17 04:37:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:51,028 INFO L225 Difference]: With dead ends: 170067 [2021-12-17 04:37:51,028 INFO L226 Difference]: Without dead ends: 85427 [2021-12-17 04:37:51,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:51,051 INFO L933 BasicCegarLoop]: 1337 mSDtfsCounter, 1112 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:51,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1414 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:37:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85427 states. [2021-12-17 04:37:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85427 to 85426. [2021-12-17 04:37:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85426 states, 85425 states have (on average 1.074931226221832) internal successors, (91826), 85425 states have internal predecessors, (91826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85426 states to 85426 states and 91826 transitions. [2021-12-17 04:37:52,037 INFO L78 Accepts]: Start accepts. Automaton has 85426 states and 91826 transitions. Word has length 373 [2021-12-17 04:37:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:52,037 INFO L470 AbstractCegarLoop]: Abstraction has 85426 states and 91826 transitions. [2021-12-17 04:37:52,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 85426 states and 91826 transitions. [2021-12-17 04:37:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-12-17 04:37:52,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:52,047 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 04:37:52,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:37:52,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 04:37:52,265 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -593722075, now seen corresponding path program 1 times [2021-12-17 04:37:52,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038016245] [2021-12-17 04:37:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:52,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:37:52,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038016245] [2021-12-17 04:37:52,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038016245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:52,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:52,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:52,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408626812] [2021-12-17 04:37:52,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:52,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:52,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:52,380 INFO L87 Difference]: Start difference. First operand 85426 states and 91826 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:56,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:56,120 INFO L93 Difference]: Finished difference Result 192115 states and 208125 transitions. [2021-12-17 04:37:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:56,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 441 [2021-12-17 04:37:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:56,273 INFO L225 Difference]: With dead ends: 192115 [2021-12-17 04:37:56,274 INFO L226 Difference]: Without dead ends: 105117 [2021-12-17 04:37:56,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:56,316 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 789 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:56,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 1859 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:37:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105117 states. [2021-12-17 04:37:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105117 to 105098. [2021-12-17 04:37:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105098 states, 105097 states have (on average 1.065254003444437) internal successors, (111955), 105097 states have internal predecessors, (111955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105098 states to 105098 states and 111955 transitions. [2021-12-17 04:37:57,613 INFO L78 Accepts]: Start accepts. Automaton has 105098 states and 111955 transitions. Word has length 441 [2021-12-17 04:37:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:57,614 INFO L470 AbstractCegarLoop]: Abstraction has 105098 states and 111955 transitions. [2021-12-17 04:37:57,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 105098 states and 111955 transitions. [2021-12-17 04:37:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-17 04:37:57,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:57,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:57,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:37:57,807 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:57,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 460083043, now seen corresponding path program 1 times [2021-12-17 04:37:57,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:57,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013039911] [2021-12-17 04:37:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:57,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 04:37:57,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:57,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013039911] [2021-12-17 04:37:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013039911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:57,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:57,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630404387] [2021-12-17 04:37:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:57,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:57,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:57,997 INFO L87 Difference]: Start difference. First operand 105098 states and 111955 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:02,141 INFO L93 Difference]: Finished difference Result 260707 states and 278328 transitions. [2021-12-17 04:38:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:02,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 451 [2021-12-17 04:38:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:02,339 INFO L225 Difference]: With dead ends: 260707 [2021-12-17 04:38:02,339 INFO L226 Difference]: Without dead ends: 156398 [2021-12-17 04:38:02,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:02,373 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 971 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 3683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:02,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 550 Invalid, 3683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 04:38:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156398 states. [2021-12-17 04:38:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156398 to 152358. [2021-12-17 04:38:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152358 states, 152357 states have (on average 1.0685232710016606) internal successors, (162797), 152357 states have internal predecessors, (162797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152358 states to 152358 states and 162797 transitions. [2021-12-17 04:38:04,428 INFO L78 Accepts]: Start accepts. Automaton has 152358 states and 162797 transitions. Word has length 451 [2021-12-17 04:38:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:04,429 INFO L470 AbstractCegarLoop]: Abstraction has 152358 states and 162797 transitions. [2021-12-17 04:38:04,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 152358 states and 162797 transitions. [2021-12-17 04:38:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-12-17 04:38:04,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:04,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:04,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:38:04,440 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 993117357, now seen corresponding path program 1 times [2021-12-17 04:38:04,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:04,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967693446] [2021-12-17 04:38:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:04,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 330 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 04:38:04,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:04,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967693446] [2021-12-17 04:38:04,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967693446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:38:04,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412069613] [2021-12-17 04:38:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:04,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:04,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:04,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:38:04,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:38:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:38:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-17 04:38:05,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:05,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412069613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:05,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:05,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:38:05,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943570054] [2021-12-17 04:38:05,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:05,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:05,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:38:05,400 INFO L87 Difference]: Start difference. First operand 152358 states and 162797 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:09,393 INFO L93 Difference]: Finished difference Result 364520 states and 389837 transitions. [2021-12-17 04:38:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 463 [2021-12-17 04:38:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:09,705 INFO L225 Difference]: With dead ends: 364520 [2021-12-17 04:38:09,705 INFO L226 Difference]: Without dead ends: 206649 [2021-12-17 04:38:09,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:38:09,792 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 908 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:09,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 1756 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:38:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206649 states. [2021-12-17 04:38:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206649 to 190113. [2021-12-17 04:38:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190113 states, 190112 states have (on average 1.0612323262077092) internal successors, (201753), 190112 states have internal predecessors, (201753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190113 states to 190113 states and 201753 transitions. [2021-12-17 04:38:12,528 INFO L78 Accepts]: Start accepts. Automaton has 190113 states and 201753 transitions. Word has length 463 [2021-12-17 04:38:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:12,529 INFO L470 AbstractCegarLoop]: Abstraction has 190113 states and 201753 transitions. [2021-12-17 04:38:12,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 190113 states and 201753 transitions. [2021-12-17 04:38:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-12-17 04:38:12,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:12,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2021-12-17 04:38:12,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 04:38:12,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:12,755 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash 842063459, now seen corresponding path program 1 times [2021-12-17 04:38:12,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595451906] [2021-12-17 04:38:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:12,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:38:12,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595451906] [2021-12-17 04:38:12,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595451906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:12,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:12,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:12,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961186172] [2021-12-17 04:38:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:12,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:12,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:12,856 INFO L87 Difference]: Start difference. First operand 190113 states and 201753 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:16,680 INFO L93 Difference]: Finished difference Result 379443 states and 402645 transitions. [2021-12-17 04:38:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 504 [2021-12-17 04:38:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:16,947 INFO L225 Difference]: With dead ends: 379443 [2021-12-17 04:38:16,947 INFO L226 Difference]: Without dead ends: 190119 [2021-12-17 04:38:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:17,297 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 907 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 662 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:38:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190119 states. [2021-12-17 04:38:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190119 to 188528. [2021-12-17 04:38:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188528 states, 188527 states have (on average 1.0520455955910823) internal successors, (198339), 188527 states have internal predecessors, (198339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188528 states to 188528 states and 198339 transitions. [2021-12-17 04:38:19,450 INFO L78 Accepts]: Start accepts. Automaton has 188528 states and 198339 transitions. Word has length 504 [2021-12-17 04:38:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:19,451 INFO L470 AbstractCegarLoop]: Abstraction has 188528 states and 198339 transitions. [2021-12-17 04:38:19,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 188528 states and 198339 transitions. [2021-12-17 04:38:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-12-17 04:38:19,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:19,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:19,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:38:19,462 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1076884108, now seen corresponding path program 1 times [2021-12-17 04:38:19,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179574548] [2021-12-17 04:38:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:19,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 330 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 04:38:19,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179574548] [2021-12-17 04:38:19,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179574548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:38:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125271291] [2021-12-17 04:38:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:19,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:19,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:38:19,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 04:38:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:38:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-17 04:38:20,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125271291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:20,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:20,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:38:20,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309838117] [2021-12-17 04:38:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:20,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:20,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:20,800 INFO L87 Difference]: Start difference. First operand 188528 states and 198339 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:24,460 INFO L93 Difference]: Finished difference Result 375474 states and 394985 transitions. [2021-12-17 04:38:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:24,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2021-12-17 04:38:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:24,696 INFO L225 Difference]: With dead ends: 375474 [2021-12-17 04:38:24,697 INFO L226 Difference]: Without dead ends: 187732 [2021-12-17 04:38:24,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:24,767 INFO L933 BasicCegarLoop]: 1690 mSDtfsCounter, 880 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:24,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1814 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:38:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187732 states. [2021-12-17 04:38:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187732 to 186156. [2021-12-17 04:38:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186156 states, 186155 states have (on average 1.0518331497945261) internal successors, (195804), 186155 states have internal predecessors, (195804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186156 states to 186156 states and 195804 transitions. [2021-12-17 04:38:27,098 INFO L78 Accepts]: Start accepts. Automaton has 186156 states and 195804 transitions. Word has length 519 [2021-12-17 04:38:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:27,098 INFO L470 AbstractCegarLoop]: Abstraction has 186156 states and 195804 transitions. [2021-12-17 04:38:27,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 186156 states and 195804 transitions. [2021-12-17 04:38:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-12-17 04:38:27,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:27,115 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:27,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 04:38:27,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 04:38:27,334 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1523686472, now seen corresponding path program 1 times [2021-12-17 04:38:27,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:27,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683152236] [2021-12-17 04:38:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:27,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:38:28,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:28,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683152236] [2021-12-17 04:38:28,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683152236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:28,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:28,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:28,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361984592] [2021-12-17 04:38:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:28,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:28,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:28,224 INFO L87 Difference]: Start difference. First operand 186156 states and 195804 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:32,181 INFO L93 Difference]: Finished difference Result 373104 states and 392405 transitions. [2021-12-17 04:38:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 547 [2021-12-17 04:38:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:32,449 INFO L225 Difference]: With dead ends: 373104 [2021-12-17 04:38:32,449 INFO L226 Difference]: Without dead ends: 187737 [2021-12-17 04:38:32,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:32,567 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 857 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:32,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 1441 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:38:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187737 states. [2021-12-17 04:38:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187737 to 184578. [2021-12-17 04:38:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184578 states, 184577 states have (on average 1.0425350937549098) internal successors, (192428), 184577 states have internal predecessors, (192428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184578 states to 184578 states and 192428 transitions. [2021-12-17 04:38:34,866 INFO L78 Accepts]: Start accepts. Automaton has 184578 states and 192428 transitions. Word has length 547 [2021-12-17 04:38:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:34,867 INFO L470 AbstractCegarLoop]: Abstraction has 184578 states and 192428 transitions. [2021-12-17 04:38:34,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 184578 states and 192428 transitions. [2021-12-17 04:38:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2021-12-17 04:38:34,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:34,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:34,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 04:38:34,883 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1825616069, now seen corresponding path program 1 times [2021-12-17 04:38:34,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544889185] [2021-12-17 04:38:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:34,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 467 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 04:38:35,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:35,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544889185] [2021-12-17 04:38:35,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544889185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:35,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:35,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:35,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025122710] [2021-12-17 04:38:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:35,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:38:35,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:38:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:35,023 INFO L87 Difference]: Start difference. First operand 184578 states and 192428 transitions. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)