./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.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 0f55f072ecdf3d78d3ca7f1962c5c3e686ff404baddd6e7cb2257667b7a57198 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:06:20,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:06:20,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:06:20,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:06:20,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:06:20,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:06:20,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:06:20,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:06:20,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:06:20,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:06:20,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:06:20,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:06:20,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:06:20,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:06:20,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:06:20,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:06:20,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:06:20,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:06:20,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:06:20,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:06:20,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:06:20,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:06:20,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:06:20,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:06:20,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:06:20,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:06:20,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:06:20,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:06:20,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:06:20,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:06:20,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:06:20,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:06:20,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:06:20,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:06:20,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:06:20,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:06:20,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:06:20,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:06:20,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:06:20,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:06:20,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:06:20,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:06:20,432 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:06:20,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:06:20,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:06:20,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:06:20,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:06:20,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:06:20,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:06:20,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:06:20,436 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:06:20,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:06:20,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:06:20,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:06:20,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:06:20,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:06:20,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:06:20,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:06:20,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:06:20,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:06:20,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:06:20,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:06:20,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:06:20,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:06:20,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:06:20,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:06:20,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:06:20,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:06:20,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:06:20,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:06:20,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:06:20,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:06:20,442 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:06:20,442 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:06:20,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:06:20,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:06:20,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f55f072ecdf3d78d3ca7f1962c5c3e686ff404baddd6e7cb2257667b7a57198 [2021-12-15 12:06:20,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:06:20,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:06:20,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:06:20,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:06:20,709 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:06:20,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c [2021-12-15 12:06:20,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80ac4d9c/d26ebd5420ef444db44c2c5113a7d90e/FLAGc3844b9fc [2021-12-15 12:06:21,433 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:06:21,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c [2021-12-15 12:06:21,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80ac4d9c/d26ebd5420ef444db44c2c5113a7d90e/FLAGc3844b9fc [2021-12-15 12:06:21,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80ac4d9c/d26ebd5420ef444db44c2c5113a7d90e [2021-12-15 12:06:21,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:06:21,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:06:21,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:06:21,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:06:21,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:06:21,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:06:21" (1/1) ... [2021-12-15 12:06:21,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d65d36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:21, skipping insertion in model container [2021-12-15 12:06:21,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:06:21" (1/1) ... [2021-12-15 12:06:21,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:06:21,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:06:22,089 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[11668,11681] [2021-12-15 12:06:22,107 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[12510,12523] [2021-12-15 12:06:22,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:06:22,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:06:22,935 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[11668,11681] [2021-12-15 12:06:22,941 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[12510,12523] [2021-12-15 12:06:23,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:06:23,442 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:06:23,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23 WrapperNode [2021-12-15 12:06:23,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:06:23,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:06:23,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:06:23,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:06:23,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:23,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:23,977 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5088 [2021-12-15 12:06:23,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:06:23,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:06:23,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:06:23,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:06:23,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:23,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:06:24,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:06:24,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:06:24,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:06:24,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (1/1) ... [2021-12-15 12:06:24,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:06:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:06:24,433 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) [2021-12-15 12:06:24,443 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 [2021-12-15 12:06:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:06:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:06:24,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:06:24,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:06:24,567 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:06:24,568 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:06:28,109 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:06:28,134 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:06:28,134 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:06:28,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:06:28 BoogieIcfgContainer [2021-12-15 12:06:28,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:06:28,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:06:28,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:06:28,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:06:28,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:06:21" (1/3) ... [2021-12-15 12:06:28,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b55c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:06:28, skipping insertion in model container [2021-12-15 12:06:28,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:23" (2/3) ... [2021-12-15 12:06:28,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b55c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:06:28, skipping insertion in model container [2021-12-15 12:06:28,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:06:28" (3/3) ... [2021-12-15 12:06:28,149 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c [2021-12-15 12:06:28,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:06:28,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:06:28,213 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:06:28,221 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 [2021-12-15 12:06:28,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:06:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 12:06:28,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:28,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:28,280 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2082356780, now seen corresponding path program 1 times [2021-12-15 12:06:28,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673083898] [2021-12-15 12:06:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:28,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:28,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:28,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673083898] [2021-12-15 12:06:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673083898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:28,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:28,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:06:28,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709825361] [2021-12-15 12:06:28,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:28,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:28,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:28,483 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:31,910 INFO L93 Difference]: Finished difference Result 2538 states and 4880 transitions. [2021-12-15 12:06:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 12:06:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:31,931 INFO L225 Difference]: With dead ends: 2538 [2021-12-15 12:06:31,931 INFO L226 Difference]: Without dead ends: 1596 [2021-12-15 12:06:31,937 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 [2021-12-15 12:06:31,940 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 1044 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:31,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1044 Valid, 311 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 12:06:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-15 12:06:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-15 12:06:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.8387703889585947) internal successors, (2931), 1595 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2931 transitions. [2021-12-15 12:06:32,049 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2931 transitions. Word has length 7 [2021-12-15 12:06:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:32,049 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2931 transitions. [2021-12-15 12:06:32,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2931 transitions. [2021-12-15 12:06:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 12:06:32,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:32,052 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] [2021-12-15 12:06:32,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:06:32,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-15 12:06:32,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:32,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361545241] [2021-12-15 12:06:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:32,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:32,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:32,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361545241] [2021-12-15 12:06:32,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361545241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:32,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:32,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:06:32,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752284438] [2021-12-15 12:06:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:32,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:06:32,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:06:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:06:32,135 INFO L87 Difference]: Start difference. First operand 1596 states and 2931 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:32,213 INFO L93 Difference]: Finished difference Result 1654 states and 3020 transitions. [2021-12-15 12:06:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:06:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-15 12:06:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:32,221 INFO L225 Difference]: With dead ends: 1654 [2021-12-15 12:06:32,221 INFO L226 Difference]: Without dead ends: 1596 [2021-12-15 12:06:32,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:32,223 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:32,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-15 12:06:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-15 12:06:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.819322459222083) internal successors, (2900), 1595 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2900 transitions. [2021-12-15 12:06:32,259 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2900 transitions. Word has length 34 [2021-12-15 12:06:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:32,259 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2900 transitions. [2021-12-15 12:06:32,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2900 transitions. [2021-12-15 12:06:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 12:06:32,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:32,262 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, 1, 1, 1] [2021-12-15 12:06:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:06:32,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-15 12:06:32,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:32,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424683390] [2021-12-15 12:06:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:32,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:32,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:32,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424683390] [2021-12-15 12:06:32,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424683390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:32,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:32,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:32,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162622391] [2021-12-15 12:06:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:32,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:32,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:32,352 INFO L87 Difference]: Start difference. First operand 1596 states and 2900 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:32,383 INFO L93 Difference]: Finished difference Result 1698 states and 3060 transitions. [2021-12-15 12:06:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-15 12:06:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:32,391 INFO L225 Difference]: With dead ends: 1698 [2021-12-15 12:06:32,391 INFO L226 Difference]: Without dead ends: 1644 [2021-12-15 12:06:32,392 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 [2021-12-15 12:06:32,393 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:32,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-12-15 12:06:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1642. [2021-12-15 12:06:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1640 states have (on average 1.8128048780487804) internal successors, (2973), 1641 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2973 transitions. [2021-12-15 12:06:32,432 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2973 transitions. Word has length 64 [2021-12-15 12:06:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2973 transitions. [2021-12-15 12:06:32,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2973 transitions. [2021-12-15 12:06:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 12:06:32,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:32,435 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, 1, 1, 1] [2021-12-15 12:06:32,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:06:32,435 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:32,436 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-15 12:06:32,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:32,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976840802] [2021-12-15 12:06:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:32,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:32,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976840802] [2021-12-15 12:06:32,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976840802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:32,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:32,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:32,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981923748] [2021-12-15 12:06:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:32,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:32,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:32,548 INFO L87 Difference]: Start difference. First operand 1642 states and 2973 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:32,757 INFO L93 Difference]: Finished difference Result 2642 states and 4553 transitions. [2021-12-15 12:06:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 12:06:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-15 12:06:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:32,769 INFO L225 Difference]: With dead ends: 2642 [2021-12-15 12:06:32,769 INFO L226 Difference]: Without dead ends: 2542 [2021-12-15 12:06:32,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-15 12:06:32,772 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:32,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-12-15 12:06:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1740. [2021-12-15 12:06:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1738 states have (on average 1.7986191024165707) internal successors, (3126), 1739 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 3126 transitions. [2021-12-15 12:06:32,826 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 3126 transitions. Word has length 64 [2021-12-15 12:06:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:32,827 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 3126 transitions. [2021-12-15 12:06:32,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 3126 transitions. [2021-12-15 12:06:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:32,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:32,829 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, 1, 1, 1, 1, 1] [2021-12-15 12:06:32,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:06:32,829 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-15 12:06:32,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709345329] [2021-12-15 12:06:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:32,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:32,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:32,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709345329] [2021-12-15 12:06:32,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709345329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:32,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:32,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:32,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644791147] [2021-12-15 12:06:32,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:32,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:32,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:32,896 INFO L87 Difference]: Start difference. First operand 1740 states and 3126 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:32,939 INFO L93 Difference]: Finished difference Result 2114 states and 3710 transitions. [2021-12-15 12:06:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:06:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:32,948 INFO L225 Difference]: With dead ends: 2114 [2021-12-15 12:06:32,948 INFO L226 Difference]: Without dead ends: 1916 [2021-12-15 12:06:32,949 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 [2021-12-15 12:06:32,950 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:32,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-15 12:06:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1910. [2021-12-15 12:06:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.7735849056603774) internal successors, (3384), 1909 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3384 transitions. [2021-12-15 12:06:33,032 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3384 transitions. Word has length 66 [2021-12-15 12:06:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:33,033 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3384 transitions. [2021-12-15 12:06:33,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3384 transitions. [2021-12-15 12:06:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:33,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:33,034 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, 1, 1, 1, 1, 1] [2021-12-15 12:06:33,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:06:33,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-15 12:06:33,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:33,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018071240] [2021-12-15 12:06:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:33,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:33,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018071240] [2021-12-15 12:06:33,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018071240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:33,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:33,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:33,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927380684] [2021-12-15 12:06:33,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:33,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:33,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:33,261 INFO L87 Difference]: Start difference. First operand 1910 states and 3384 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:33,431 INFO L93 Difference]: Finished difference Result 2280 states and 3954 transitions. [2021-12-15 12:06:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:06:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:33,440 INFO L225 Difference]: With dead ends: 2280 [2021-12-15 12:06:33,440 INFO L226 Difference]: Without dead ends: 1912 [2021-12-15 12:06:33,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-15 12:06:33,443 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3170 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3170 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:33,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3170 Valid, 1896 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-12-15 12:06:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1910. [2021-12-15 12:06:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.771488469601677) internal successors, (3380), 1909 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3380 transitions. [2021-12-15 12:06:33,492 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3380 transitions. Word has length 66 [2021-12-15 12:06:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:33,492 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3380 transitions. [2021-12-15 12:06:33,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3380 transitions. [2021-12-15 12:06:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:33,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:33,494 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, 1, 1, 1, 1, 1] [2021-12-15 12:06:33,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:06:33,494 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-15 12:06:33,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:33,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560907014] [2021-12-15 12:06:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:33,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:33,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560907014] [2021-12-15 12:06:33,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560907014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:33,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:33,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:33,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957875826] [2021-12-15 12:06:33,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:33,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:33,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:33,538 INFO L87 Difference]: Start difference. First operand 1910 states and 3380 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:33,589 INFO L93 Difference]: Finished difference Result 2598 states and 4430 transitions. [2021-12-15 12:06:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:06:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:33,601 INFO L225 Difference]: With dead ends: 2598 [2021-12-15 12:06:33,601 INFO L226 Difference]: Without dead ends: 2230 [2021-12-15 12:06:33,603 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 [2021-12-15 12:06:33,604 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:33,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-12-15 12:06:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2228. [2021-12-15 12:06:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2226 states have (on average 1.7322551662174304) internal successors, (3856), 2227 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3856 transitions. [2021-12-15 12:06:33,670 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3856 transitions. Word has length 66 [2021-12-15 12:06:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:33,670 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 3856 transitions. [2021-12-15 12:06:33,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3856 transitions. [2021-12-15 12:06:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:33,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:33,672 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, 1, 1, 1, 1, 1] [2021-12-15 12:06:33,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:06:33,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-15 12:06:33,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:33,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523595793] [2021-12-15 12:06:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:33,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:33,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523595793] [2021-12-15 12:06:33,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523595793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:33,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:33,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:33,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696187982] [2021-12-15 12:06:33,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:33,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:33,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:33,729 INFO L87 Difference]: Start difference. First operand 2228 states and 3856 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:33,789 INFO L93 Difference]: Finished difference Result 3504 states and 5778 transitions. [2021-12-15 12:06:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:33,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:06:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:33,801 INFO L225 Difference]: With dead ends: 3504 [2021-12-15 12:06:33,801 INFO L226 Difference]: Without dead ends: 2818 [2021-12-15 12:06:33,804 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 [2021-12-15 12:06:33,804 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:33,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-12-15 12:06:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2816. [2021-12-15 12:06:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2814 states have (on average 1.6773276474769012) internal successors, (4720), 2815 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4720 transitions. [2021-12-15 12:06:33,888 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4720 transitions. Word has length 66 [2021-12-15 12:06:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:33,889 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4720 transitions. [2021-12-15 12:06:33,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4720 transitions. [2021-12-15 12:06:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:33,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:33,890 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, 1, 1, 1, 1, 1] [2021-12-15 12:06:33,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:06:33,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-15 12:06:33,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454027795] [2021-12-15 12:06:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:33,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:33,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:33,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454027795] [2021-12-15 12:06:33,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454027795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:33,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:33,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:33,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035703055] [2021-12-15 12:06:33,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:33,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:33,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:33,922 INFO L87 Difference]: Start difference. First operand 2816 states and 4720 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:34,018 INFO L93 Difference]: Finished difference Result 5172 states and 8210 transitions. [2021-12-15 12:06:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:06:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:34,034 INFO L225 Difference]: With dead ends: 5172 [2021-12-15 12:06:34,034 INFO L226 Difference]: Without dead ends: 3898 [2021-12-15 12:06:34,037 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 [2021-12-15 12:06:34,038 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:34,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-12-15 12:06:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3896. [2021-12-15 12:06:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3894 states have (on average 1.610683102208526) internal successors, (6272), 3895 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 6272 transitions. [2021-12-15 12:06:34,228 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 6272 transitions. Word has length 66 [2021-12-15 12:06:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 3896 states and 6272 transitions. [2021-12-15 12:06:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 6272 transitions. [2021-12-15 12:06:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:06:34,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:34,234 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, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:34,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:06:34,235 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-15 12:06:34,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:34,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173385467] [2021-12-15 12:06:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:34,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:34,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:34,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173385467] [2021-12-15 12:06:34,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173385467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:34,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:34,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:06:34,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837258870] [2021-12-15 12:06:34,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:34,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:06:34,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:06:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:06:34,325 INFO L87 Difference]: Start difference. First operand 3896 states and 6272 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:34,603 INFO L93 Difference]: Finished difference Result 5654 states and 8806 transitions. [2021-12-15 12:06:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:06:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 12:06:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:34,624 INFO L225 Difference]: With dead ends: 5654 [2021-12-15 12:06:34,624 INFO L226 Difference]: Without dead ends: 5652 [2021-12-15 12:06:34,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 12:06:34,627 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 600 mSDsluCounter, 9089 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 10692 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:34,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 10692 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-12-15 12:06:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 3992. [2021-12-15 12:06:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3990 states have (on average 1.5919799498746867) internal successors, (6352), 3991 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6352 transitions. [2021-12-15 12:06:34,805 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6352 transitions. Word has length 67 [2021-12-15 12:06:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:34,805 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 6352 transitions. [2021-12-15 12:06:34,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6352 transitions. [2021-12-15 12:06:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:06:34,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:34,807 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:06:34,807 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-15 12:06:34,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:34,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853375534] [2021-12-15 12:06:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:34,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:34,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:34,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853375534] [2021-12-15 12:06:34,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853375534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:34,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:34,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:34,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490025258] [2021-12-15 12:06:34,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:34,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:34,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:34,842 INFO L87 Difference]: Start difference. First operand 3992 states and 6352 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:35,064 INFO L93 Difference]: Finished difference Result 6495 states and 10006 transitions. [2021-12-15 12:06:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-15 12:06:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:35,075 INFO L225 Difference]: With dead ends: 6495 [2021-12-15 12:06:35,076 INFO L226 Difference]: Without dead ends: 5116 [2021-12-15 12:06:35,078 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 [2021-12-15 12:06:35,079 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:35,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-12-15 12:06:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5114. [2021-12-15 12:06:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5112 states have (on average 1.5528169014084507) internal successors, (7938), 5113 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7938 transitions. [2021-12-15 12:06:35,335 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7938 transitions. Word has length 68 [2021-12-15 12:06:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:35,336 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 7938 transitions. [2021-12-15 12:06:35,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7938 transitions. [2021-12-15 12:06:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 12:06:35,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:35,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:35,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:06:35,338 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1771432862, now seen corresponding path program 1 times [2021-12-15 12:06:35,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:35,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694318606] [2021-12-15 12:06:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:35,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:35,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694318606] [2021-12-15 12:06:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694318606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:35,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:35,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:06:35,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576497753] [2021-12-15 12:06:35,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:35,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:35,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:35,382 INFO L87 Difference]: Start difference. First operand 5114 states and 7938 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:39,057 INFO L93 Difference]: Finished difference Result 8120 states and 13489 transitions. [2021-12-15 12:06:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-15 12:06:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:39,075 INFO L225 Difference]: With dead ends: 8120 [2021-12-15 12:06:39,075 INFO L226 Difference]: Without dead ends: 6616 [2021-12-15 12:06:39,080 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 [2021-12-15 12:06:39,081 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 851 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:39,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 597 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 12:06:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-12-15 12:06:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 6616. [2021-12-15 12:06:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6614 states have (on average 1.49077713940127) internal successors, (9860), 6615 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 9860 transitions. [2021-12-15 12:06:39,370 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 9860 transitions. Word has length 76 [2021-12-15 12:06:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:39,371 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 9860 transitions. [2021-12-15 12:06:39,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 9860 transitions. [2021-12-15 12:06:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 12:06:39,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:39,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:39,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:06:39,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash 88029262, now seen corresponding path program 1 times [2021-12-15 12:06:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:39,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737347130] [2021-12-15 12:06:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:39,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:39,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737347130] [2021-12-15 12:06:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737347130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:39,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:39,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:39,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833846563] [2021-12-15 12:06:39,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:39,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 12:06:39,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 12:06:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 12:06:39,447 INFO L87 Difference]: Start difference. First operand 6616 states and 9860 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:43,983 INFO L93 Difference]: Finished difference Result 13377 states and 20198 transitions. [2021-12-15 12:06:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 12:06:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 12:06:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:44,041 INFO L225 Difference]: With dead ends: 13377 [2021-12-15 12:06:44,041 INFO L226 Difference]: Without dead ends: 10371 [2021-12-15 12:06:44,046 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 [2021-12-15 12:06:44,048 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 2418 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4918 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2418 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 5722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 4918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:44,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2418 Valid, 418 Invalid, 5722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 4918 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 12:06:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2021-12-15 12:06:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 10371. [2021-12-15 12:06:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10369 states have (on average 1.4607001639502364) internal successors, (15146), 10370 states have internal predecessors, (15146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 15146 transitions. [2021-12-15 12:06:44,327 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 15146 transitions. Word has length 84 [2021-12-15 12:06:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:44,328 INFO L470 AbstractCegarLoop]: Abstraction has 10371 states and 15146 transitions. [2021-12-15 12:06:44,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 15146 transitions. [2021-12-15 12:06:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:44,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:44,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:06:44,332 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-15 12:06:44,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911043436] [2021-12-15 12:06:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:44,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 12:06:44,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911043436] [2021-12-15 12:06:44,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911043436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:44,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:44,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:44,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188483153] [2021-12-15 12:06:44,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:44,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:44,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:44,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:44,406 INFO L87 Difference]: Start difference. First operand 10371 states and 15146 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:45,238 INFO L93 Difference]: Finished difference Result 28943 states and 41744 transitions. [2021-12-15 12:06:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 12:06:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:45,293 INFO L225 Difference]: With dead ends: 28943 [2021-12-15 12:06:45,293 INFO L226 Difference]: Without dead ends: 25373 [2021-12-15 12:06:45,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:45,309 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6639 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6639 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:45,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6639 Valid, 3585 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25373 states. [2021-12-15 12:06:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25373 to 13939. [2021-12-15 12:06:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 13937 states have (on average 1.4506708760852407) internal successors, (20218), 13938 states have internal predecessors, (20218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 20218 transitions. [2021-12-15 12:06:45,820 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 20218 transitions. Word has length 95 [2021-12-15 12:06:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:45,820 INFO L470 AbstractCegarLoop]: Abstraction has 13939 states and 20218 transitions. [2021-12-15 12:06:45,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 20218 transitions. [2021-12-15 12:06:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:45,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:45,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:45,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:06:45,824 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-15 12:06:45,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247830262] [2021-12-15 12:06:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:45,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 12:06:45,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247830262] [2021-12-15 12:06:45,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247830262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:45,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:45,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:45,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664565687] [2021-12-15 12:06:45,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:45,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:45,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:45,904 INFO L87 Difference]: Start difference. First operand 13939 states and 20218 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:46,755 INFO L93 Difference]: Finished difference Result 32511 states and 46816 transitions. [2021-12-15 12:06:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 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 95 [2021-12-15 12:06:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:46,808 INFO L225 Difference]: With dead ends: 32511 [2021-12-15 12:06:46,808 INFO L226 Difference]: Without dead ends: 28941 [2021-12-15 12:06:46,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:46,826 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6527 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6527 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:46,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6527 Valid, 3644 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28941 states. [2021-12-15 12:06:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28941 to 19299. [2021-12-15 12:06:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19299 states, 19297 states have (on average 1.4399129398352075) internal successors, (27786), 19298 states have internal predecessors, (27786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19299 states to 19299 states and 27786 transitions. [2021-12-15 12:06:47,609 INFO L78 Accepts]: Start accepts. Automaton has 19299 states and 27786 transitions. Word has length 95 [2021-12-15 12:06:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:47,609 INFO L470 AbstractCegarLoop]: Abstraction has 19299 states and 27786 transitions. [2021-12-15 12:06:47,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 19299 states and 27786 transitions. [2021-12-15 12:06:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:47,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:47,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:47,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:06:47,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:47,619 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-15 12:06:47,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:47,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330893610] [2021-12-15 12:06:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:47,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 12:06:47,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330893610] [2021-12-15 12:06:47,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330893610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:47,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:47,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:47,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26338603] [2021-12-15 12:06:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:47,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:47,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:47,694 INFO L87 Difference]: Start difference. First operand 19299 states and 27786 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:48,718 INFO L93 Difference]: Finished difference Result 36079 states and 51888 transitions. [2021-12-15 12:06:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 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 95 [2021-12-15 12:06:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:48,766 INFO L225 Difference]: With dead ends: 36079 [2021-12-15 12:06:48,766 INFO L226 Difference]: Without dead ends: 32509 [2021-12-15 12:06:48,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:48,774 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6537 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6537 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:48,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6537 Valid, 3676 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32509 states. [2021-12-15 12:06:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32509 to 22867. [2021-12-15 12:06:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22867 states, 22865 states have (on average 1.437043516291275) internal successors, (32858), 22866 states have internal predecessors, (32858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22867 states to 22867 states and 32858 transitions. [2021-12-15 12:06:49,644 INFO L78 Accepts]: Start accepts. Automaton has 22867 states and 32858 transitions. Word has length 95 [2021-12-15 12:06:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:49,645 INFO L470 AbstractCegarLoop]: Abstraction has 22867 states and 32858 transitions. [2021-12-15 12:06:49,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22867 states and 32858 transitions. [2021-12-15 12:06:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:49,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:49,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:49,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:06:49,650 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-15 12:06:49,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:49,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811054884] [2021-12-15 12:06:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:49,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:06:49,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811054884] [2021-12-15 12:06:49,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811054884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:49,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:49,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:49,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178157113] [2021-12-15 12:06:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:49,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:49,741 INFO L87 Difference]: Start difference. First operand 22867 states and 32858 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:50,924 INFO L93 Difference]: Finished difference Result 39647 states and 56960 transitions. [2021-12-15 12:06:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 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 95 [2021-12-15 12:06:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:50,972 INFO L225 Difference]: With dead ends: 39647 [2021-12-15 12:06:50,972 INFO L226 Difference]: Without dead ends: 36077 [2021-12-15 12:06:50,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:50,984 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6612 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6612 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:50,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6612 Valid, 3623 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36077 states. [2021-12-15 12:06:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36077 to 26435. [2021-12-15 12:06:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26435 states, 26433 states have (on average 1.4349487383195247) internal successors, (37930), 26434 states have internal predecessors, (37930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26435 states to 26435 states and 37930 transitions. [2021-12-15 12:06:51,999 INFO L78 Accepts]: Start accepts. Automaton has 26435 states and 37930 transitions. Word has length 95 [2021-12-15 12:06:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:51,999 INFO L470 AbstractCegarLoop]: Abstraction has 26435 states and 37930 transitions. [2021-12-15 12:06:51,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 26435 states and 37930 transitions. [2021-12-15 12:06:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 12:06:52,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:52,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:52,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:06:52,004 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-15 12:06:52,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:52,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852584527] [2021-12-15 12:06:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:52,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:52,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852584527] [2021-12-15 12:06:52,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852584527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:52,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:52,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:52,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063969149] [2021-12-15 12:06:52,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:52,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:52,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:52,049 INFO L87 Difference]: Start difference. First operand 26435 states and 37930 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:52,836 INFO L93 Difference]: Finished difference Result 40197 states and 57680 transitions. [2021-12-15 12:06:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-15 12:06:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:52,858 INFO L225 Difference]: With dead ends: 40197 [2021-12-15 12:06:52,858 INFO L226 Difference]: Without dead ends: 20563 [2021-12-15 12:06:52,870 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 [2021-12-15 12:06:52,870 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:52,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20563 states. [2021-12-15 12:06:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20563 to 20561. [2021-12-15 12:06:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20561 states, 20559 states have (on average 1.4396128216352935) internal successors, (29597), 20560 states have internal predecessors, (29597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20561 states to 20561 states and 29597 transitions. [2021-12-15 12:06:53,438 INFO L78 Accepts]: Start accepts. Automaton has 20561 states and 29597 transitions. Word has length 97 [2021-12-15 12:06:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 20561 states and 29597 transitions. [2021-12-15 12:06:53,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 20561 states and 29597 transitions. [2021-12-15 12:06:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 12:06:53,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:53,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:53,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:06:53,443 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-15 12:06:53,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:53,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500042299] [2021-12-15 12:06:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:53,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:06:53,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500042299] [2021-12-15 12:06:53,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500042299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:53,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:53,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:53,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103865925] [2021-12-15 12:06:53,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:53,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:53,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:53,512 INFO L87 Difference]: Start difference. First operand 20561 states and 29597 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:54,716 INFO L93 Difference]: Finished difference Result 33053 states and 47523 transitions. [2021-12-15 12:06:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:54,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 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 97 [2021-12-15 12:06:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:54,756 INFO L225 Difference]: With dead ends: 33053 [2021-12-15 12:06:54,756 INFO L226 Difference]: Without dead ends: 30555 [2021-12-15 12:06:54,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:54,769 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6588 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6588 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:54,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6588 Valid, 3608 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-12-15 12:06:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 23057. [2021-12-15 12:06:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23057 states, 23055 states have (on average 1.4378225981348949) internal successors, (33149), 23056 states have internal predecessors, (33149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23057 states to 23057 states and 33149 transitions. [2021-12-15 12:06:55,722 INFO L78 Accepts]: Start accepts. Automaton has 23057 states and 33149 transitions. Word has length 97 [2021-12-15 12:06:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:55,723 INFO L470 AbstractCegarLoop]: Abstraction has 23057 states and 33149 transitions. [2021-12-15 12:06:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 23057 states and 33149 transitions. [2021-12-15 12:06:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:55,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:55,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:55,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:06:55,728 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-15 12:06:55,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148403550] [2021-12-15 12:06:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:55,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:55,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148403550] [2021-12-15 12:06:55,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148403550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:55,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:55,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:55,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324830084] [2021-12-15 12:06:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:55,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:55,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:55,765 INFO L87 Difference]: Start difference. First operand 23057 states and 33149 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:56,164 INFO L93 Difference]: Finished difference Result 31173 states and 44695 transitions. [2021-12-15 12:06:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:56,186 INFO L225 Difference]: With dead ends: 31173 [2021-12-15 12:06:56,187 INFO L226 Difference]: Without dead ends: 14947 [2021-12-15 12:06:56,209 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 [2021-12-15 12:06:56,211 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:56,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14947 states. [2021-12-15 12:06:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14947 to 14945. [2021-12-15 12:06:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14945 states, 14943 states have (on average 1.4388676972495482) internal successors, (21501), 14944 states have internal predecessors, (21501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14945 states to 14945 states and 21501 transitions. [2021-12-15 12:06:56,608 INFO L78 Accepts]: Start accepts. Automaton has 14945 states and 21501 transitions. Word has length 98 [2021-12-15 12:06:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:56,608 INFO L470 AbstractCegarLoop]: Abstraction has 14945 states and 21501 transitions. [2021-12-15 12:06:56,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 14945 states and 21501 transitions. [2021-12-15 12:06:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:56,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:56,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:56,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 12:06:56,612 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:56,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-15 12:06:56,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880191767] [2021-12-15 12:06:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:56,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:56,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:56,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880191767] [2021-12-15 12:06:56,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880191767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:56,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:56,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:56,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952684061] [2021-12-15 12:06:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:56,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:56,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:56,648 INFO L87 Difference]: Start difference. First operand 14945 states and 21501 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:56,889 INFO L93 Difference]: Finished difference Result 19005 states and 27223 transitions. [2021-12-15 12:06:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:56,900 INFO L225 Difference]: With dead ends: 19005 [2021-12-15 12:06:56,900 INFO L226 Difference]: Without dead ends: 10891 [2021-12-15 12:06:56,907 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 [2021-12-15 12:06:56,908 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:56,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10891 states. [2021-12-15 12:06:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10891 to 10889. [2021-12-15 12:06:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10889 states, 10887 states have (on average 1.4447506200055111) internal successors, (15729), 10888 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10889 states to 10889 states and 15729 transitions. [2021-12-15 12:06:57,119 INFO L78 Accepts]: Start accepts. Automaton has 10889 states and 15729 transitions. Word has length 98 [2021-12-15 12:06:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:57,120 INFO L470 AbstractCegarLoop]: Abstraction has 10889 states and 15729 transitions. [2021-12-15 12:06:57,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10889 states and 15729 transitions. [2021-12-15 12:06:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:57,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:57,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:57,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 12:06:57,122 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-15 12:06:57,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:57,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066099021] [2021-12-15 12:06:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:57,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:57,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066099021] [2021-12-15 12:06:57,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066099021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:57,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:57,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:57,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437814413] [2021-12-15 12:06:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:57,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:57,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:57,158 INFO L87 Difference]: Start difference. First operand 10889 states and 15729 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:57,308 INFO L93 Difference]: Finished difference Result 12921 states and 18565 transitions. [2021-12-15 12:06:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:57,320 INFO L225 Difference]: With dead ends: 12921 [2021-12-15 12:06:57,321 INFO L226 Difference]: Without dead ends: 8863 [2021-12-15 12:06:57,327 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 [2021-12-15 12:06:57,328 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:57,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8863 states. [2021-12-15 12:06:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8863 to 8861. [2021-12-15 12:06:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8861 states, 8859 states have (on average 1.4526470256236597) internal successors, (12869), 8860 states have internal predecessors, (12869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8861 states to 8861 states and 12869 transitions. [2021-12-15 12:06:57,533 INFO L78 Accepts]: Start accepts. Automaton has 8861 states and 12869 transitions. Word has length 98 [2021-12-15 12:06:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:57,533 INFO L470 AbstractCegarLoop]: Abstraction has 8861 states and 12869 transitions. [2021-12-15 12:06:57,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 8861 states and 12869 transitions. [2021-12-15 12:06:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:57,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:57,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:57,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 12:06:57,535 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-15 12:06:57,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054712767] [2021-12-15 12:06:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:57,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:57,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:57,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054712767] [2021-12-15 12:06:57,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054712767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:06:57,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605863560] [2021-12-15 12:06:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:57,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:06:57,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:06:57,719 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) [2021-12-15 12:06:57,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 12:06:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:57,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 12:06:57,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:06:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:06:58,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:06:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:06:58,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605863560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:06:58,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:06:58,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-15 12:06:58,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351669569] [2021-12-15 12:06:58,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:06:58,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 12:06:58,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 12:06:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-15 12:06:58,651 INFO L87 Difference]: Start difference. First operand 8861 states and 12869 transitions. Second operand has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:07:01,995 INFO L93 Difference]: Finished difference Result 30483 states and 42483 transitions. [2021-12-15 12:07:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 12:07:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 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 98 [2021-12-15 12:07:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:07:02,033 INFO L225 Difference]: With dead ends: 30483 [2021-12-15 12:07:02,034 INFO L226 Difference]: Without dead ends: 28453 [2021-12-15 12:07:02,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 12:07:02,044 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 14570 mSDsluCounter, 5462 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14570 SdHoareTripleChecker+Valid, 7055 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 12:07:02,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14570 Valid, 7055 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 12:07:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2021-12-15 12:07:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 20213. [2021-12-15 12:07:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20213 states, 20211 states have (on average 1.3717282667854138) internal successors, (27724), 20212 states have internal predecessors, (27724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20213 states to 20213 states and 27724 transitions. [2021-12-15 12:07:02,794 INFO L78 Accepts]: Start accepts. Automaton has 20213 states and 27724 transitions. Word has length 98 [2021-12-15 12:07:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:07:02,795 INFO L470 AbstractCegarLoop]: Abstraction has 20213 states and 27724 transitions. [2021-12-15 12:07:02,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20213 states and 27724 transitions. [2021-12-15 12:07:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 12:07:02,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:02,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:07:02,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 12:07:03,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 12:07:03,017 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1125120587, now seen corresponding path program 1 times [2021-12-15 12:07:03,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:03,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134426591] [2021-12-15 12:07:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:03,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:03,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:03,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134426591] [2021-12-15 12:07:03,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134426591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:07:03,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798704399] [2021-12-15 12:07:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:03,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:07:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:07:03,160 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) [2021-12-15 12:07:03,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 12:07:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 12:07:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:07:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:04,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:07:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:04,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798704399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:07:04,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:07:04,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-15 12:07:04,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950830207] [2021-12-15 12:07:04,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:07:04,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 12:07:04,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:07:04,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 12:07:04,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-15 12:07:04,776 INFO L87 Difference]: Start difference. First operand 20213 states and 27724 transitions. Second operand has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:07:08,912 INFO L93 Difference]: Finished difference Result 77094 states and 102269 transitions. [2021-12-15 12:07:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 12:07:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-15 12:07:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:07:09,015 INFO L225 Difference]: With dead ends: 77094 [2021-12-15 12:07:09,016 INFO L226 Difference]: Without dead ends: 64197 [2021-12-15 12:07:09,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1342, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 12:07:09,042 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 11348 mSDsluCounter, 6696 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11348 SdHoareTripleChecker+Valid, 8253 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 12:07:09,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11348 Valid, 8253 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 12:07:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64197 states. [2021-12-15 12:07:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64197 to 41919. [2021-12-15 12:07:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41919 states, 41917 states have (on average 1.3318701242932462) internal successors, (55828), 41918 states have internal predecessors, (55828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41919 states to 41919 states and 55828 transitions. [2021-12-15 12:07:11,316 INFO L78 Accepts]: Start accepts. Automaton has 41919 states and 55828 transitions. Word has length 99 [2021-12-15 12:07:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:07:11,316 INFO L470 AbstractCegarLoop]: Abstraction has 41919 states and 55828 transitions. [2021-12-15 12:07:11,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 41919 states and 55828 transitions. [2021-12-15 12:07:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 12:07:11,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:11,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:07:11,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 12:07:11,540 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,SelfDestructingSolverStorable23 [2021-12-15 12:07:11,541 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash 110338453, now seen corresponding path program 1 times [2021-12-15 12:07:11,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:11,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454509878] [2021-12-15 12:07:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:11,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:11,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:11,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454509878] [2021-12-15 12:07:11,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454509878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:07:11,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808955588] [2021-12-15 12:07:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:11,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:07:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:07:11,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:07:11,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 12:07:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:07:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:07:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:12,627 INFO L328 TraceCheckSpWp]: Computing backward predicates...