./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label57.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_label57.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 606add1ed9f1e0586ce8d6fd9687905298c8e4323967309eabbf0457b8710a5c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:42:09,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:42:09,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:42:09,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:42:09,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:42:09,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:42:09,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:42:09,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:42:09,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:42:09,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:42:09,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:42:09,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:42:09,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:42:09,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:42:09,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:42:09,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:42:09,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:42:09,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:42:09,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:42:09,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:42:09,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:42:09,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:42:09,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:42:09,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:42:09,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:42:09,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:42:09,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:42:09,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:42:09,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:42:09,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:42:09,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:42:09,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:42:09,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:42:09,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:42:09,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:42:09,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:42:09,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:42:09,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:42:09,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:42:09,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:42:09,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:42:09,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:42:09,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:42:09,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:42:09,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:42:09,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:42:09,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:42:09,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:42:09,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:42:09,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:42:09,490 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:42:09,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:42:09,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:42:09,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:42:09,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:42:09,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:42:09,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:42:09,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:42:09,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:42:09,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:42:09,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:09,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:42:09,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:42:09,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:42:09,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:42:09,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:42:09,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:42:09,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:42:09,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:42:09,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:42:09,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 606add1ed9f1e0586ce8d6fd9687905298c8e4323967309eabbf0457b8710a5c [2021-12-17 04:42:09,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:42:09,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:42:09,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:42:09,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:42:09,734 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:42:09,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label57.c [2021-12-17 04:42:09,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cca1d4e5/608ab315271d4794bb337f13fa7fdbaf/FLAG18b7b9e87 [2021-12-17 04:42:10,490 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:42:10,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label57.c [2021-12-17 04:42:10,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cca1d4e5/608ab315271d4794bb337f13fa7fdbaf/FLAG18b7b9e87 [2021-12-17 04:42:10,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cca1d4e5/608ab315271d4794bb337f13fa7fdbaf [2021-12-17 04:42:10,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:42:10,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:42:10,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:10,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:42:10,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:42:10,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:10" (1/1) ... [2021-12-17 04:42:10,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ad6efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:10, skipping insertion in model container [2021-12-17 04:42:10,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:10" (1/1) ... [2021-12-17 04:42:10,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:42:10,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:42:11,166 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_label57.c[8676,8689] [2021-12-17 04:42:11,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:11,860 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:42:11,886 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_label57.c[8676,8689] [2021-12-17 04:42:12,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:12,211 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:42:12,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12 WrapperNode [2021-12-17 04:42:12,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:12,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:12,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:42:12,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:42:12,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:12,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:12,829 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:42:12,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:12,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:42:12,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:42:12,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:42:12,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:12,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:12,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:12,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:13,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:13,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:13,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:13,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:42:13,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:42:13,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:42:13,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:42:13,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (1/1) ... [2021-12-17 04:42:13,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:13,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:13,413 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 04:42:13,428 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 04:42:13,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:42:13,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:42:13,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:42:13,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:42:13,509 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:42:13,510 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:42:17,134 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:42:17,156 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:42:17,157 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:42:17,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:17 BoogieIcfgContainer [2021-12-17 04:42:17,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:42:17,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:42:17,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:42:17,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:42:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:42:10" (1/3) ... [2021-12-17 04:42:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59816c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:17, skipping insertion in model container [2021-12-17 04:42:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:12" (2/3) ... [2021-12-17 04:42:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59816c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:17, skipping insertion in model container [2021-12-17 04:42:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:17" (3/3) ... [2021-12-17 04:42:17,168 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label57.c [2021-12-17 04:42:17,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:42:17,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:42:17,213 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:42:17,218 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 04:42:17,219 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:42:17,252 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 04:42:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 04:42:17,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:17,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:17,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-12-17 04:42:17,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:17,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482639487] [2021-12-17 04:42:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:17,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:17,491 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 04:42:17,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:17,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482639487] [2021-12-17 04:42:17,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482639487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:17,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:17,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:17,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622808452] [2021-12-17 04:42:17,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:17,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:17,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:17,531 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 04:42:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:21,777 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-17 04:42:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-17 04:42:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:21,806 INFO L225 Difference]: With dead ends: 3121 [2021-12-17 04:42:21,806 INFO L226 Difference]: Without dead ends: 1944 [2021-12-17 04:42:21,814 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 04:42:21,817 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 928 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:21,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 04:42:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-17 04:42:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-17 04:42:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 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 04:42:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-17 04:42:22,086 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 61 [2021-12-17 04:42:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:22,087 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-17 04:42:22,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 04:42:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-17 04:42:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 04:42:22,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:22,095 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, 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] [2021-12-17 04:42:22,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:42:22,097 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2089015554, now seen corresponding path program 1 times [2021-12-17 04:42:22,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646262947] [2021-12-17 04:42:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:22,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:22,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:22,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646262947] [2021-12-17 04:42:22,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646262947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:22,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:22,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:22,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407811978] [2021-12-17 04:42:22,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:22,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:22,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:22,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:22,386 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 04:42:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:26,605 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-17 04:42:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:26,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-17 04:42:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:26,616 INFO L225 Difference]: With dead ends: 6152 [2021-12-17 04:42:26,617 INFO L226 Difference]: Without dead ends: 4281 [2021-12-17 04:42:26,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:42:26,622 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2626 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:26,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 1019 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 04:42:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-17 04:42:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-17 04:42:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4772143024071045) internal successors, (6321), 4279 states have internal predecessors, (6321), 0 states have call successors, (0), 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 04:42:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6321 transitions. [2021-12-17 04:42:26,674 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6321 transitions. Word has length 126 [2021-12-17 04:42:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:26,676 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6321 transitions. [2021-12-17 04:42:26,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 04:42:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6321 transitions. [2021-12-17 04:42:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-17 04:42:26,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:26,681 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:26,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:42:26,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash -540021261, now seen corresponding path program 1 times [2021-12-17 04:42:26,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:26,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881399401] [2021-12-17 04:42:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:26,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:42:26,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881399401] [2021-12-17 04:42:26,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881399401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:26,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:26,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:26,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655550488] [2021-12-17 04:42:26,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:26,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:26,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:26,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:26,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:26,830 INFO L87 Difference]: Start difference. First operand 4280 states and 6321 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 04:42:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:29,744 INFO L93 Difference]: Finished difference Result 10955 states and 16961 transitions. [2021-12-17 04:42:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 04:42:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:29,803 INFO L225 Difference]: With dead ends: 10955 [2021-12-17 04:42:29,803 INFO L226 Difference]: Without dead ends: 7464 [2021-12-17 04:42:29,810 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 04:42:29,824 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 941 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:29,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 868 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:42:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2021-12-17 04:42:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 7455. [2021-12-17 04:42:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 1.3945532599946338) internal successors, (10395), 7454 states have internal predecessors, (10395), 0 states have call successors, (0), 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 04:42:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 10395 transitions. [2021-12-17 04:42:29,955 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 10395 transitions. Word has length 228 [2021-12-17 04:42:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:29,956 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 10395 transitions. [2021-12-17 04:42:29,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 04:42:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 10395 transitions. [2021-12-17 04:42:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-17 04:42:29,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:29,959 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:29,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:42:29,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:29,961 INFO L85 PathProgramCache]: Analyzing trace with hash 456843222, now seen corresponding path program 1 times [2021-12-17 04:42:29,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:29,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001198437] [2021-12-17 04:42:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:29,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:42:30,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:30,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001198437] [2021-12-17 04:42:30,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001198437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:30,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:30,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:30,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697858242] [2021-12-17 04:42:30,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:30,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:30,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:30,076 INFO L87 Difference]: Start difference. First operand 7455 states and 10395 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 04:42:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:32,469 INFO L93 Difference]: Finished difference Result 20420 states and 29108 transitions. [2021-12-17 04:42:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-12-17 04:42:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:32,504 INFO L225 Difference]: With dead ends: 20420 [2021-12-17 04:42:32,505 INFO L226 Difference]: Without dead ends: 13754 [2021-12-17 04:42:32,513 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 04:42:32,514 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:32,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 988 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:42:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13754 states. [2021-12-17 04:42:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13754 to 12964. [2021-12-17 04:42:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2915991668595233) internal successors, (16743), 12963 states have internal predecessors, (16743), 0 states have call successors, (0), 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 04:42:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16743 transitions. [2021-12-17 04:42:32,686 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16743 transitions. Word has length 242 [2021-12-17 04:42:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:32,686 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16743 transitions. [2021-12-17 04:42:32,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 04:42:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16743 transitions. [2021-12-17 04:42:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-17 04:42:32,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:32,689 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:32,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:42:32,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 521952067, now seen corresponding path program 1 times [2021-12-17 04:42:32,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:32,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303053654] [2021-12-17 04:42:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:32,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:32,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:32,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303053654] [2021-12-17 04:42:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303053654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:32,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:32,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:32,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494354362] [2021-12-17 04:42:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:32,779 INFO L87 Difference]: Start difference. First operand 12964 states and 16743 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:36,017 INFO L93 Difference]: Finished difference Result 36960 states and 48179 transitions. [2021-12-17 04:42:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-12-17 04:42:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:36,056 INFO L225 Difference]: With dead ends: 36960 [2021-12-17 04:42:36,056 INFO L226 Difference]: Without dead ends: 24785 [2021-12-17 04:42:36,066 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 04:42:36,067 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 857 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:36,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 909 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:42:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24785 states. [2021-12-17 04:42:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24785 to 23987. [2021-12-17 04:42:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23987 states, 23986 states have (on average 1.2284249145334778) internal successors, (29465), 23986 states have internal predecessors, (29465), 0 states have call successors, (0), 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 04:42:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23987 states to 23987 states and 29465 transitions. [2021-12-17 04:42:36,358 INFO L78 Accepts]: Start accepts. Automaton has 23987 states and 29465 transitions. Word has length 260 [2021-12-17 04:42:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:36,360 INFO L470 AbstractCegarLoop]: Abstraction has 23987 states and 29465 transitions. [2021-12-17 04:42:36,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 23987 states and 29465 transitions. [2021-12-17 04:42:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-17 04:42:36,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:36,368 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:36,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:42:36,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:36,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1450383638, now seen corresponding path program 1 times [2021-12-17 04:42:36,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:36,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018178868] [2021-12-17 04:42:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:36,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:36,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018178868] [2021-12-17 04:42:36,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018178868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:36,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:36,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:36,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264766387] [2021-12-17 04:42:36,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:36,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:36,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:36,545 INFO L87 Difference]: Start difference. First operand 23987 states and 29465 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 04:42:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:40,981 INFO L93 Difference]: Finished difference Result 79502 states and 99244 transitions. [2021-12-17 04:42:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:40,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 349 [2021-12-17 04:42:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:41,069 INFO L225 Difference]: With dead ends: 79502 [2021-12-17 04:42:41,070 INFO L226 Difference]: Without dead ends: 56304 [2021-12-17 04:42:41,092 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 04:42:41,092 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 1766 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4652 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 5817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 4652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:41,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1766 Valid, 767 Invalid, 5817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 4652 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 04:42:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56304 states. [2021-12-17 04:42:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56304 to 56300. [2021-12-17 04:42:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56300 states, 56299 states have (on average 1.2042487433169329) internal successors, (67798), 56299 states have internal predecessors, (67798), 0 states have call successors, (0), 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 04:42:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56300 states to 56300 states and 67798 transitions. [2021-12-17 04:42:41,752 INFO L78 Accepts]: Start accepts. Automaton has 56300 states and 67798 transitions. Word has length 349 [2021-12-17 04:42:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:41,753 INFO L470 AbstractCegarLoop]: Abstraction has 56300 states and 67798 transitions. [2021-12-17 04:42:41,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 04:42:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 56300 states and 67798 transitions. [2021-12-17 04:42:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-17 04:42:41,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:41,760 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:41,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:42:41,761 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1030719342, now seen corresponding path program 1 times [2021-12-17 04:42:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991836174] [2021-12-17 04:42:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-17 04:42:41,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:41,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991836174] [2021-12-17 04:42:41,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991836174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:41,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:41,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:41,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161965868] [2021-12-17 04:42:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:41,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:41,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:41,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:41,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:41,863 INFO L87 Difference]: Start difference. First operand 56300 states and 67798 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 04:42:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:48,159 INFO L93 Difference]: Finished difference Result 156897 states and 190600 transitions. [2021-12-17 04:42:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:48,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 349 [2021-12-17 04:42:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:48,395 INFO L225 Difference]: With dead ends: 156897 [2021-12-17 04:42:48,395 INFO L226 Difference]: Without dead ends: 101386 [2021-12-17 04:42:48,448 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 04:42:48,449 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1733 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6696 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 6696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:48,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 741 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 6696 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 04:42:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101386 states. [2021-12-17 04:42:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101386 to 100465. [2021-12-17 04:42:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100465 states, 100464 states have (on average 1.1949852683548337) internal successors, (120053), 100464 states have internal predecessors, (120053), 0 states have call successors, (0), 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 04:42:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100465 states to 100465 states and 120053 transitions. [2021-12-17 04:42:50,126 INFO L78 Accepts]: Start accepts. Automaton has 100465 states and 120053 transitions. Word has length 349 [2021-12-17 04:42:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:50,126 INFO L470 AbstractCegarLoop]: Abstraction has 100465 states and 120053 transitions. [2021-12-17 04:42:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 04:42:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 100465 states and 120053 transitions. [2021-12-17 04:42:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-17 04:42:50,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:50,132 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, 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, 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 04:42:50,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:42:50,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash -817883493, now seen corresponding path program 1 times [2021-12-17 04:42:50,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:50,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312417155] [2021-12-17 04:42:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:50,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-17 04:42:50,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:50,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312417155] [2021-12-17 04:42:50,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312417155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:50,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:50,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:50,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576481904] [2021-12-17 04:42:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:50,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:50,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:50,393 INFO L87 Difference]: Start difference. First operand 100465 states and 120053 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 04:42:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:53,381 INFO L93 Difference]: Finished difference Result 233236 states and 277203 transitions. [2021-12-17 04:42:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:53,388 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 358 [2021-12-17 04:42:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:53,602 INFO L225 Difference]: With dead ends: 233236 [2021-12-17 04:42:53,603 INFO L226 Difference]: Without dead ends: 133560 [2021-12-17 04:42:53,662 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 04:42:53,663 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 753 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:53,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1992 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:42:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133560 states. [2021-12-17 04:42:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133560 to 133521. [2021-12-17 04:42:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133521 states, 133520 states have (on average 1.1670835829838226) internal successors, (155829), 133520 states have internal predecessors, (155829), 0 states have call successors, (0), 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 04:42:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133521 states to 133521 states and 155829 transitions. [2021-12-17 04:42:55,554 INFO L78 Accepts]: Start accepts. Automaton has 133521 states and 155829 transitions. Word has length 358 [2021-12-17 04:42:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:55,554 INFO L470 AbstractCegarLoop]: Abstraction has 133521 states and 155829 transitions. [2021-12-17 04:42:55,555 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 04:42:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 133521 states and 155829 transitions. [2021-12-17 04:42:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-12-17 04:42:55,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:55,565 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, 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, 2, 2, 2, 2, 2, 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 04:42:55,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:42:55,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash -650269085, now seen corresponding path program 1 times [2021-12-17 04:42:55,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:55,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627657186] [2021-12-17 04:42:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:55,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 289 proven. 110 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-17 04:42:55,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627657186] [2021-12-17 04:42:55,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627657186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939415188] [2021-12-17 04:42:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:55,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:55,809 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 04:42:55,811 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 04:42:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:42:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-17 04:42:56,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939415188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:56,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:56,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:42:56,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330167046] [2021-12-17 04:42:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:56,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:56,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:56,538 INFO L87 Difference]: Start difference. First operand 133521 states and 155829 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 04:42:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:59,909 INFO L93 Difference]: Finished difference Result 266252 states and 310864 transitions. [2021-12-17 04:42:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:59,910 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 387 [2021-12-17 04:42:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:00,118 INFO L225 Difference]: With dead ends: 266252 [2021-12-17 04:43:00,119 INFO L226 Difference]: Without dead ends: 133520 [2021-12-17 04:43:00,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 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 04:43:00,179 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 1123 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:00,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 1447 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:43:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133520 states. [2021-12-17 04:43:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133520 to 132727. [2021-12-17 04:43:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132727 states, 132726 states have (on average 1.121460753733255) internal successors, (148847), 132726 states have internal predecessors, (148847), 0 states have call successors, (0), 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 04:43:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132727 states to 132727 states and 148847 transitions. [2021-12-17 04:43:01,925 INFO L78 Accepts]: Start accepts. Automaton has 132727 states and 148847 transitions. Word has length 387 [2021-12-17 04:43:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:01,926 INFO L470 AbstractCegarLoop]: Abstraction has 132727 states and 148847 transitions. [2021-12-17 04:43:01,926 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 04:43:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 132727 states and 148847 transitions. [2021-12-17 04:43:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-12-17 04:43:01,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:01,941 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, 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, 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 04:43:01,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 04:43:02,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:02,155 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1828462211, now seen corresponding path program 1 times [2021-12-17 04:43:02,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868423095] [2021-12-17 04:43:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:02,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:43:02,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868423095] [2021-12-17 04:43:02,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868423095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:02,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:02,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:02,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116139313] [2021-12-17 04:43:02,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:02,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:02,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:02,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:02,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:02,340 INFO L87 Difference]: Start difference. First operand 132727 states and 148847 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 04:43:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:06,200 INFO L93 Difference]: Finished difference Result 303243 states and 343614 transitions. [2021-12-17 04:43:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2021-12-17 04:43:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:06,424 INFO L225 Difference]: With dead ends: 303243 [2021-12-17 04:43:06,425 INFO L226 Difference]: Without dead ends: 171305 [2021-12-17 04:43:06,505 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 04:43:06,510 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 779 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:06,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1943 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171305 states. [2021-12-17 04:43:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171305 to 169714. [2021-12-17 04:43:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169714 states, 169713 states have (on average 1.103504151125724) internal successors, (187279), 169713 states have internal predecessors, (187279), 0 states have call successors, (0), 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 04:43:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169714 states to 169714 states and 187279 transitions. [2021-12-17 04:43:08,776 INFO L78 Accepts]: Start accepts. Automaton has 169714 states and 187279 transitions. Word has length 455 [2021-12-17 04:43:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:08,776 INFO L470 AbstractCegarLoop]: Abstraction has 169714 states and 187279 transitions. [2021-12-17 04:43:08,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 04:43:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 169714 states and 187279 transitions. [2021-12-17 04:43:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-17 04:43:08,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:08,790 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, 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, 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 04:43:08,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:43:08,791 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:08,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1394646619, now seen corresponding path program 1 times [2021-12-17 04:43:08,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:08,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622915341] [2021-12-17 04:43:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:08,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 358 proven. 110 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-17 04:43:09,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622915341] [2021-12-17 04:43:09,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622915341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:43:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251549978] [2021-12-17 04:43:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:09,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:43:09,056 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 04:43:09,059 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 04:43:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:43:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:43:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-17 04:43:09,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:43:09,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251549978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:09,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:43:09,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:43:09,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644600746] [2021-12-17 04:43:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:09,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:09,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:43:09,891 INFO L87 Difference]: Start difference. First operand 169714 states and 187279 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 04:43:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:14,249 INFO L93 Difference]: Finished difference Result 370915 states and 412586 transitions. [2021-12-17 04:43:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 477 [2021-12-17 04:43:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:14,537 INFO L225 Difference]: With dead ends: 370915 [2021-12-17 04:43:14,537 INFO L226 Difference]: Without dead ends: 201990 [2021-12-17 04:43:14,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:43:14,605 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 968 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:14,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 803 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:43:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201990 states. [2021-12-17 04:43:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201990 to 200396. [2021-12-17 04:43:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200396 states, 200395 states have (on average 1.1076523865365902) internal successors, (221968), 200395 states have internal predecessors, (221968), 0 states have call successors, (0), 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 04:43:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200396 states to 200396 states and 221968 transitions. [2021-12-17 04:43:17,788 INFO L78 Accepts]: Start accepts. Automaton has 200396 states and 221968 transitions. Word has length 477 [2021-12-17 04:43:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 200396 states and 221968 transitions. [2021-12-17 04:43:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 04:43:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 200396 states and 221968 transitions. [2021-12-17 04:43:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-12-17 04:43:17,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:17,837 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-12-17 04:43:17,854 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 04:43:18,053 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,SelfDestructingSolverStorable10 [2021-12-17 04:43:18,055 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1773125861, now seen corresponding path program 1 times [2021-12-17 04:43:18,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:18,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15285483] [2021-12-17 04:43:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:18,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 915 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-17 04:43:18,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15285483] [2021-12-17 04:43:18,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15285483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:18,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:18,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:18,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691481743] [2021-12-17 04:43:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:18,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:18,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:18,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:18,319 INFO L87 Difference]: Start difference. First operand 200396 states and 221968 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 04:43:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:22,336 INFO L93 Difference]: Finished difference Result 400013 states and 443162 transitions. [2021-12-17 04:43:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 574 [2021-12-17 04:43:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:23,060 INFO L225 Difference]: With dead ends: 400013 [2021-12-17 04:43:23,060 INFO L226 Difference]: Without dead ends: 200406 [2021-12-17 04:43:23,160 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 04:43:23,162 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 936 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:23,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1513 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:43:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200406 states. [2021-12-17 04:43:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200406 to 200389. [2021-12-17 04:43:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200389 states, 200388 states have (on average 1.0820707826815976) internal successors, (216834), 200388 states have internal predecessors, (216834), 0 states have call successors, (0), 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 04:43:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200389 states to 200389 states and 216834 transitions. [2021-12-17 04:43:26,198 INFO L78 Accepts]: Start accepts. Automaton has 200389 states and 216834 transitions. Word has length 574 [2021-12-17 04:43:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:26,199 INFO L470 AbstractCegarLoop]: Abstraction has 200389 states and 216834 transitions. [2021-12-17 04:43:26,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 04:43:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 200389 states and 216834 transitions. [2021-12-17 04:43:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2021-12-17 04:43:26,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:26,227 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:26,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:43:26,227 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1574321022, now seen corresponding path program 1 times [2021-12-17 04:43:26,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:26,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001987611] [2021-12-17 04:43:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:26,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 809 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-17 04:43:26,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001987611] [2021-12-17 04:43:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001987611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:26,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:26,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:26,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314625177] [2021-12-17 04:43:26,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:26,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:26,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:26,427 INFO L87 Difference]: Start difference. First operand 200389 states and 216834 transitions. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 04:43:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:30,539 INFO L93 Difference]: Finished difference Result 411769 states and 444800 transitions. [2021-12-17 04:43:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:30,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 610 [2021-12-17 04:43:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:31,184 INFO L225 Difference]: With dead ends: 411769 [2021-12-17 04:43:31,184 INFO L226 Difference]: Without dead ends: 205081 [2021-12-17 04:43:31,239 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 04:43:31,242 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 1017 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:31,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 1628 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:43:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205081 states. [2021-12-17 04:43:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205081 to 190110. [2021-12-17 04:43:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190110 states, 190109 states have (on average 1.058056167777433) internal successors, (201146), 190109 states have internal predecessors, (201146), 0 states have call successors, (0), 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 04:43:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190110 states to 190110 states and 201146 transitions. [2021-12-17 04:43:34,192 INFO L78 Accepts]: Start accepts. Automaton has 190110 states and 201146 transitions. Word has length 610 [2021-12-17 04:43:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:34,215 INFO L470 AbstractCegarLoop]: Abstraction has 190110 states and 201146 transitions. [2021-12-17 04:43:34,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 04:43:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 190110 states and 201146 transitions. [2021-12-17 04:43:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2021-12-17 04:43:34,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:34,255 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:34,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:43:34,256 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -314230058, now seen corresponding path program 1 times [2021-12-17 04:43:34,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:34,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411676338] [2021-12-17 04:43:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:34,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-12-17 04:43:34,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:34,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411676338] [2021-12-17 04:43:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411676338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:34,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:34,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:34,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552453794] [2021-12-17 04:43:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:34,588 INFO L87 Difference]: Start difference. First operand 190110 states and 201146 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 04:43:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:38,440 INFO L93 Difference]: Finished difference Result 370730 states and 393040 transitions. [2021-12-17 04:43:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 615 [2021-12-17 04:43:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:38,783 INFO L225 Difference]: With dead ends: 370730 [2021-12-17 04:43:38,783 INFO L226 Difference]: Without dead ends: 200303 [2021-12-17 04:43:38,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 04:43:38,860 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1178 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:38,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 346 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:43:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200303 states.