./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.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 46eee0da026a91c653f67365567ceb713876734d6acca1e922dede9c0b7a4734 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:00:02,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:00:02,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:00:02,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:00:02,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:00:02,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:00:02,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:00:02,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:00:02,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:00:02,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:00:02,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:00:02,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:00:02,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:00:02,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:00:02,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:00:02,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:00:02,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:00:02,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:00:02,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:00:02,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:00:02,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:00:02,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:00:02,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:00:02,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:00:02,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:00:02,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:00:02,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:00:02,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:00:02,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:00:02,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:00:02,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:00:02,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:00:02,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:00:02,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:00:02,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:00:02,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:00:02,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:00:02,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:00:02,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:00:02,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:00:02,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:00:02,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:00:02,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:00:02,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:00:02,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:00:02,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:00:02,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:00:02,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:00:02,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:00:02,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:00:02,558 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:00:02,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:00:02,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:00:02,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:00:02,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:00:02,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:00:02,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:00:02,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:00:02,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:00:02,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:00:02,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:00:02,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:00:02,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:00:02,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:00:02,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:00:02,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:00:02,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:00:02,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:00:02,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:00:02,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:00:02,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:00:02,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:00:02,562 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:00:02,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:00:02,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:00:02,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:00:02,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46eee0da026a91c653f67365567ceb713876734d6acca1e922dede9c0b7a4734 [2021-12-17 21:00:02,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:00:02,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:00:02,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:00:02,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:00:02,785 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:00:02,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-17 21:00:02,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974a994d9/b973a462c3224f56a617c72879cd149d/FLAGa116bdc0f [2021-12-17 21:00:03,392 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:00:03,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-17 21:00:03,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974a994d9/b973a462c3224f56a617c72879cd149d/FLAGa116bdc0f [2021-12-17 21:00:03,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974a994d9/b973a462c3224f56a617c72879cd149d [2021-12-17 21:00:03,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:00:03,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:00:03,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:00:03,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:00:03,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:00:03,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:00:03" (1/1) ... [2021-12-17 21:00:03,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b824a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:03, skipping insertion in model container [2021-12-17 21:00:03,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:00:03" (1/1) ... [2021-12-17 21:00:03,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:00:03,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:00:04,225 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.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[26925,26938] [2021-12-17 21:00:04,250 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.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[32480,32493] [2021-12-17 21:00:04,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:00:04,776 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:00:04,830 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.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[26925,26938] [2021-12-17 21:00:04,839 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.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[32480,32493] [2021-12-17 21:00:05,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:00:05,136 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:00:05,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05 WrapperNode [2021-12-17 21:00:05,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:00:05,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:00:05,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:00:05,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:00:05,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,475 INFO L137 Inliner]: procedures = 40, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5280 [2021-12-17 21:00:05,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:00:05,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:00:05,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:00:05,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:00:05,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:00:05,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:00:05,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:00:05,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:00:05,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (1/1) ... [2021-12-17 21:00:05,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:00:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:00:05,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:00:06,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:00:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:00:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:00:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:00:06,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:00:06,164 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:00:06,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:00:08,740 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:00:08,750 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:00:08,750 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:00:08,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:00:08 BoogieIcfgContainer [2021-12-17 21:00:08,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:00:08,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:00:08,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:00:08,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:00:08,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:00:03" (1/3) ... [2021-12-17 21:00:08,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47281fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:00:08, skipping insertion in model container [2021-12-17 21:00:08,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:00:05" (2/3) ... [2021-12-17 21:00:08,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47281fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:00:08, skipping insertion in model container [2021-12-17 21:00:08,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:00:08" (3/3) ... [2021-12-17 21:00:08,758 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-17 21:00:08,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:00:08,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:00:08,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:00:08,797 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:00:08,797 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:00:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 21:00:08,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:08,823 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] [2021-12-17 21:00:08,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2021-12-17 21:00:08,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:08,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540579048] [2021-12-17 21:00:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:08,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:08,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:08,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540579048] [2021-12-17 21:00:08,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540579048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:08,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:08,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:00:08,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735214118] [2021-12-17 21:00:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:08,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:00:08,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:00:08,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:00:08,995 INFO L87 Difference]: Start difference. First operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 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 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:09,040 INFO L93 Difference]: Finished difference Result 1861 states and 3516 transitions. [2021-12-17 21:00:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:00:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-17 21:00:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:09,053 INFO L225 Difference]: With dead ends: 1861 [2021-12-17 21:00:09,053 INFO L226 Difference]: Without dead ends: 899 [2021-12-17 21:00:09,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:00:09,060 INFO L933 BasicCegarLoop]: 1755 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:09,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-12-17 21:00:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2021-12-17 21:00:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 897 states have (on average 1.8851727982162765) internal successors, (1691), 898 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1691 transitions. [2021-12-17 21:00:09,127 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1691 transitions. Word has length 46 [2021-12-17 21:00:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:09,127 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1691 transitions. [2021-12-17 21:00:09,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1691 transitions. [2021-12-17 21:00:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 21:00:09,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:09,133 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] [2021-12-17 21:00:09,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:00:09,133 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2021-12-17 21:00:09,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:09,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776326727] [2021-12-17 21:00:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:09,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:09,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776326727] [2021-12-17 21:00:09,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776326727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:09,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:09,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:00:09,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469366586] [2021-12-17 21:00:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:09,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:00:09,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:09,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:00:09,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:00:09,226 INFO L87 Difference]: Start difference. First operand 899 states and 1691 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:09,331 INFO L93 Difference]: Finished difference Result 981 states and 1819 transitions. [2021-12-17 21:00:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:00:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-17 21:00:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:09,335 INFO L225 Difference]: With dead ends: 981 [2021-12-17 21:00:09,335 INFO L226 Difference]: Without dead ends: 899 [2021-12-17 21:00:09,336 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 [2021-12-17 21:00:09,337 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 3 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:09,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6692 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:00:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-12-17 21:00:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2021-12-17 21:00:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 897 states have (on average 1.8171683389074693) internal successors, (1630), 898 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1630 transitions. [2021-12-17 21:00:09,349 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1630 transitions. Word has length 46 [2021-12-17 21:00:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:09,349 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1630 transitions. [2021-12-17 21:00:09,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1630 transitions. [2021-12-17 21:00:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 21:00:09,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:09,350 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] [2021-12-17 21:00:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:00:09,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1418201483, now seen corresponding path program 1 times [2021-12-17 21:00:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:09,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049822739] [2021-12-17 21:00:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:09,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:09,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:09,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049822739] [2021-12-17 21:00:09,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049822739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:09,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:09,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:00:09,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459792917] [2021-12-17 21:00:09,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:09,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:09,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:09,435 INFO L87 Difference]: Start difference. First operand 899 states and 1630 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:12,589 INFO L93 Difference]: Finished difference Result 2403 states and 4503 transitions. [2021-12-17 21:00:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-17 21:00:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:12,594 INFO L225 Difference]: With dead ends: 2403 [2021-12-17 21:00:12,594 INFO L226 Difference]: Without dead ends: 1650 [2021-12-17 21:00:12,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:12,596 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 958 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:12,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 268 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 21:00:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-17 21:00:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-17 21:00:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.8234223300970873) internal successors, (3005), 1649 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 3005 transitions. [2021-12-17 21:00:12,634 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 3005 transitions. Word has length 48 [2021-12-17 21:00:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:12,636 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 3005 transitions. [2021-12-17 21:00:12,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 3005 transitions. [2021-12-17 21:00:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:12,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:12,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:12,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:00:12,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2021-12-17 21:00:12,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:12,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665282659] [2021-12-17 21:00:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:12,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:12,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665282659] [2021-12-17 21:00:12,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665282659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:12,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:12,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:12,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612838533] [2021-12-17 21:00:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:12,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:12,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:12,867 INFO L87 Difference]: Start difference. First operand 1650 states and 3005 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:12,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:12,893 INFO L93 Difference]: Finished difference Result 1800 states and 3243 transitions. [2021-12-17 21:00:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:12,904 INFO L225 Difference]: With dead ends: 1800 [2021-12-17 21:00:12,905 INFO L226 Difference]: Without dead ends: 1722 [2021-12-17 21:00:12,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:12,906 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 1549 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1850 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 [2021-12-17 21:00:12,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1850 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:12,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-12-17 21:00:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2021-12-17 21:00:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1718 states have (on average 1.8143189755529685) internal successors, (3117), 1719 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 3117 transitions. [2021-12-17 21:00:12,937 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 3117 transitions. Word has length 106 [2021-12-17 21:00:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:12,938 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 3117 transitions. [2021-12-17 21:00:12,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 3117 transitions. [2021-12-17 21:00:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:12,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:12,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:12,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:00:12,941 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2021-12-17 21:00:12,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668093638] [2021-12-17 21:00:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:12,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:13,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668093638] [2021-12-17 21:00:13,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668093638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:13,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:13,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:13,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624523091] [2021-12-17 21:00:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:13,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:13,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,026 INFO L87 Difference]: Start difference. First operand 1720 states and 3117 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:13,052 INFO L93 Difference]: Finished difference Result 2004 states and 3569 transitions. [2021-12-17 21:00:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:13,059 INFO L225 Difference]: With dead ends: 2004 [2021-12-17 21:00:13,059 INFO L226 Difference]: Without dead ends: 1856 [2021-12-17 21:00:13,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,061 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 1545 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1849 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 [2021-12-17 21:00:13,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1545 Valid, 1849 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-12-17 21:00:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1854. [2021-12-17 21:00:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1852 states have (on average 1.7980561555075594) internal successors, (3330), 1853 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 3330 transitions. [2021-12-17 21:00:13,087 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 3330 transitions. Word has length 106 [2021-12-17 21:00:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:13,088 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 3330 transitions. [2021-12-17 21:00:13,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 3330 transitions. [2021-12-17 21:00:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:13,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:13,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:13,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:00:13,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2021-12-17 21:00:13,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:13,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365175652] [2021-12-17 21:00:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:13,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:13,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:13,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365175652] [2021-12-17 21:00:13,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365175652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:13,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:13,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:13,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215299921] [2021-12-17 21:00:13,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:13,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:13,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:13,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:13,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,168 INFO L87 Difference]: Start difference. First operand 1854 states and 3330 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:13,203 INFO L93 Difference]: Finished difference Result 2394 states and 4188 transitions. [2021-12-17 21:00:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:13,213 INFO L225 Difference]: With dead ends: 2394 [2021-12-17 21:00:13,213 INFO L226 Difference]: Without dead ends: 2112 [2021-12-17 21:00:13,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,219 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 1541 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1848 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 [2021-12-17 21:00:13,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1848 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-12-17 21:00:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2110. [2021-12-17 21:00:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2108 states have (on average 1.77134724857685) internal successors, (3734), 2109 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 3734 transitions. [2021-12-17 21:00:13,275 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 3734 transitions. Word has length 106 [2021-12-17 21:00:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:13,276 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 3734 transitions. [2021-12-17 21:00:13,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 3734 transitions. [2021-12-17 21:00:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:13,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:13,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:13,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:00:13,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:13,278 INFO L85 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2021-12-17 21:00:13,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:13,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473972752] [2021-12-17 21:00:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:13,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:13,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:13,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473972752] [2021-12-17 21:00:13,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473972752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:13,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:13,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:13,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606272791] [2021-12-17 21:00:13,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:13,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:13,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:13,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,347 INFO L87 Difference]: Start difference. First operand 2110 states and 3734 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:13,378 INFO L93 Difference]: Finished difference Result 3138 states and 5360 transitions. [2021-12-17 21:00:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:13,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:13,386 INFO L225 Difference]: With dead ends: 3138 [2021-12-17 21:00:13,387 INFO L226 Difference]: Without dead ends: 2600 [2021-12-17 21:00:13,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,392 INFO L933 BasicCegarLoop]: 1709 mSDtfsCounter, 1537 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1847 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 [2021-12-17 21:00:13,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1847 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-12-17 21:00:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2598. [2021-12-17 21:00:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2596 states have (on average 1.7326656394453004) internal successors, (4498), 2597 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 4498 transitions. [2021-12-17 21:00:13,446 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 4498 transitions. Word has length 106 [2021-12-17 21:00:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:13,447 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 4498 transitions. [2021-12-17 21:00:13,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 4498 transitions. [2021-12-17 21:00:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:13,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:13,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:13,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:00:13,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2021-12-17 21:00:13,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:13,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74831363] [2021-12-17 21:00:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:13,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:13,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:13,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74831363] [2021-12-17 21:00:13,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74831363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:13,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:13,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:13,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751166752] [2021-12-17 21:00:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:13,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:13,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,539 INFO L87 Difference]: Start difference. First operand 2598 states and 4498 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:13,625 INFO L93 Difference]: Finished difference Result 4554 states and 7572 transitions. [2021-12-17 21:00:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:13,637 INFO L225 Difference]: With dead ends: 4554 [2021-12-17 21:00:13,637 INFO L226 Difference]: Without dead ends: 3528 [2021-12-17 21:00:13,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,638 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1533 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1846 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 [2021-12-17 21:00:13,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1846 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-12-17 21:00:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-12-17 21:00:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3524 states have (on average 1.685017026106697) internal successors, (5938), 3525 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5938 transitions. [2021-12-17 21:00:13,712 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5938 transitions. Word has length 106 [2021-12-17 21:00:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5938 transitions. [2021-12-17 21:00:13,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5938 transitions. [2021-12-17 21:00:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:13,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:13,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:13,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:00:13,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2021-12-17 21:00:13,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:13,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944888611] [2021-12-17 21:00:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:13,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:13,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944888611] [2021-12-17 21:00:13,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944888611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:13,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:13,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:13,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760101231] [2021-12-17 21:00:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:13,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:13,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:13,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,775 INFO L87 Difference]: Start difference. First operand 3526 states and 5938 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:13,851 INFO L93 Difference]: Finished difference Result 7242 states and 11732 transitions. [2021-12-17 21:00:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:13,867 INFO L225 Difference]: With dead ends: 7242 [2021-12-17 21:00:13,867 INFO L226 Difference]: Without dead ends: 5288 [2021-12-17 21:00:13,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:13,877 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 1529 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1845 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 [2021-12-17 21:00:13,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1845 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2021-12-17 21:00:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5286. [2021-12-17 21:00:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5286 states, 5284 states have (on average 1.6355034065102196) internal successors, (8642), 5285 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 8642 transitions. [2021-12-17 21:00:14,046 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 8642 transitions. Word has length 106 [2021-12-17 21:00:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:14,047 INFO L470 AbstractCegarLoop]: Abstraction has 5286 states and 8642 transitions. [2021-12-17 21:00:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 8642 transitions. [2021-12-17 21:00:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:14,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:14,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:14,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:00:14,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2021-12-17 21:00:14,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:14,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791408145] [2021-12-17 21:00:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:14,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:14,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791408145] [2021-12-17 21:00:14,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791408145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:14,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:14,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:14,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764434018] [2021-12-17 21:00:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:14,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:14,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:14,091 INFO L87 Difference]: Start difference. First operand 5286 states and 8642 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:14,229 INFO L93 Difference]: Finished difference Result 12330 states and 19524 transitions. [2021-12-17 21:00:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:14,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:14,261 INFO L225 Difference]: With dead ends: 12330 [2021-12-17 21:00:14,262 INFO L226 Difference]: Without dead ends: 8616 [2021-12-17 21:00:14,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:14,270 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1525 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1844 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 [2021-12-17 21:00:14,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1844 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2021-12-17 21:00:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 8614. [2021-12-17 21:00:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8614 states, 8612 states have (on average 1.5905712958662332) internal successors, (13698), 8613 states have internal predecessors, (13698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8614 states to 8614 states and 13698 transitions. [2021-12-17 21:00:14,562 INFO L78 Accepts]: Start accepts. Automaton has 8614 states and 13698 transitions. Word has length 106 [2021-12-17 21:00:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:14,562 INFO L470 AbstractCegarLoop]: Abstraction has 8614 states and 13698 transitions. [2021-12-17 21:00:14,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 8614 states and 13698 transitions. [2021-12-17 21:00:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 21:00:14,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:14,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:14,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:00:14,564 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2021-12-17 21:00:14,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:14,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412792432] [2021-12-17 21:00:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:14,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:14,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412792432] [2021-12-17 21:00:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412792432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:14,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:00:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438577877] [2021-12-17 21:00:14,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:14,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:00:14,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:00:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:00:14,661 INFO L87 Difference]: Start difference. First operand 8614 states and 13698 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:16,588 INFO L93 Difference]: Finished difference Result 121286 states and 186770 transitions. [2021-12-17 21:00:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:00:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 21:00:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:16,854 INFO L225 Difference]: With dead ends: 121286 [2021-12-17 21:00:16,854 INFO L226 Difference]: Without dead ends: 114244 [2021-12-17 21:00:16,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-17 21:00:16,903 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 15488 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15488 SdHoareTripleChecker+Valid, 4869 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:16,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15488 Valid, 4869 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:00:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114244 states. [2021-12-17 21:00:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114244 to 15654. [2021-12-17 21:00:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 15652 states have (on average 1.5498338870431894) internal successors, (24258), 15653 states have internal predecessors, (24258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 24258 transitions. [2021-12-17 21:00:18,313 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 24258 transitions. Word has length 106 [2021-12-17 21:00:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:18,314 INFO L470 AbstractCegarLoop]: Abstraction has 15654 states and 24258 transitions. [2021-12-17 21:00:18,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 24258 transitions. [2021-12-17 21:00:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 21:00:18,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:18,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:18,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:00:18,316 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2021-12-17 21:00:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:18,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020757597] [2021-12-17 21:00:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:18,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:18,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020757597] [2021-12-17 21:00:18,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020757597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:18,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:18,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975733610] [2021-12-17 21:00:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:18,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:18,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:18,378 INFO L87 Difference]: Start difference. First operand 15654 states and 24258 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:19,226 INFO L93 Difference]: Finished difference Result 42410 states and 64580 transitions. [2021-12-17 21:00:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-17 21:00:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:19,286 INFO L225 Difference]: With dead ends: 42410 [2021-12-17 21:00:19,286 INFO L226 Difference]: Without dead ends: 28328 [2021-12-17 21:00:19,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:19,301 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 1516 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 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 [2021-12-17 21:00:19,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:19,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28328 states. [2021-12-17 21:00:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28328 to 28070. [2021-12-17 21:00:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28070 states, 28068 states have (on average 1.5072680632749038) internal successors, (42306), 28069 states have internal predecessors, (42306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28070 states to 28070 states and 42306 transitions. [2021-12-17 21:00:20,305 INFO L78 Accepts]: Start accepts. Automaton has 28070 states and 42306 transitions. Word has length 108 [2021-12-17 21:00:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:20,306 INFO L470 AbstractCegarLoop]: Abstraction has 28070 states and 42306 transitions. [2021-12-17 21:00:20,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28070 states and 42306 transitions. [2021-12-17 21:00:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 21:00:20,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:20,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:20,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:00:20,307 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2021-12-17 21:00:20,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:20,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474491311] [2021-12-17 21:00:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:20,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:20,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:20,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474491311] [2021-12-17 21:00:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474491311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:20,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:00:20,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688684797] [2021-12-17 21:00:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:00:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:00:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:00:20,563 INFO L87 Difference]: Start difference. First operand 28070 states and 42306 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:21,608 INFO L93 Difference]: Finished difference Result 54570 states and 81732 transitions. [2021-12-17 21:00:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:00:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-17 21:00:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:21,658 INFO L225 Difference]: With dead ends: 54570 [2021-12-17 21:00:21,658 INFO L226 Difference]: Without dead ends: 28072 [2021-12-17 21:00:21,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:00:21,694 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 3608 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3608 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:21,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3608 Valid, 2473 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:00:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28072 states. [2021-12-17 21:00:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28072 to 28070. [2021-12-17 21:00:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28070 states, 28068 states have (on average 1.4981473564201226) internal successors, (42050), 28069 states have internal predecessors, (42050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28070 states to 28070 states and 42050 transitions. [2021-12-17 21:00:22,855 INFO L78 Accepts]: Start accepts. Automaton has 28070 states and 42050 transitions. Word has length 108 [2021-12-17 21:00:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:22,855 INFO L470 AbstractCegarLoop]: Abstraction has 28070 states and 42050 transitions. [2021-12-17 21:00:22,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 28070 states and 42050 transitions. [2021-12-17 21:00:22,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 21:00:22,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:22,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:22,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:00:22,857 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:22,857 INFO L85 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2021-12-17 21:00:22,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:22,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864325286] [2021-12-17 21:00:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:22,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:22,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864325286] [2021-12-17 21:00:22,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864325286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:22,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:22,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:00:22,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860893104] [2021-12-17 21:00:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:22,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:00:22,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:00:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:00:22,937 INFO L87 Difference]: Start difference. First operand 28070 states and 42050 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:23,931 INFO L93 Difference]: Finished difference Result 54568 states and 81219 transitions. [2021-12-17 21:00:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:00:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-17 21:00:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:23,981 INFO L225 Difference]: With dead ends: 54568 [2021-12-17 21:00:23,981 INFO L226 Difference]: Without dead ends: 28070 [2021-12-17 21:00:24,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:00:24,007 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4752 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4752 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:24,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4752 Valid, 3123 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28070 states. [2021-12-17 21:00:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28070 to 28070. [2021-12-17 21:00:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28070 states, 28068 states have (on average 1.4890266495653413) internal successors, (41794), 28069 states have internal predecessors, (41794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28070 states to 28070 states and 41794 transitions. [2021-12-17 21:00:25,021 INFO L78 Accepts]: Start accepts. Automaton has 28070 states and 41794 transitions. Word has length 109 [2021-12-17 21:00:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:25,021 INFO L470 AbstractCegarLoop]: Abstraction has 28070 states and 41794 transitions. [2021-12-17 21:00:25,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 28070 states and 41794 transitions. [2021-12-17 21:00:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 21:00:25,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:25,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:25,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:00:25,023 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2021-12-17 21:00:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:25,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280207249] [2021-12-17 21:00:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:25,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:25,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280207249] [2021-12-17 21:00:25,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280207249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:25,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:25,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:00:25,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943980364] [2021-12-17 21:00:25,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:25,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:00:25,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:00:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:00:25,093 INFO L87 Difference]: Start difference. First operand 28070 states and 41794 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:26,828 INFO L93 Difference]: Finished difference Result 47696 states and 70263 transitions. [2021-12-17 21:00:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:00:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-17 21:00:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:26,898 INFO L225 Difference]: With dead ends: 47696 [2021-12-17 21:00:26,898 INFO L226 Difference]: Without dead ends: 47694 [2021-12-17 21:00:26,913 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 [2021-12-17 21:00:26,913 INFO L933 BasicCegarLoop]: 1685 mSDtfsCounter, 900 mSDsluCounter, 9383 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 11068 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 [2021-12-17 21:00:26,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 11068 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47694 states. [2021-12-17 21:00:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47694 to 28838. [2021-12-17 21:00:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28838 states, 28836 states have (on average 1.4715633236232488) internal successors, (42434), 28837 states have internal predecessors, (42434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28838 states to 28838 states and 42434 transitions. [2021-12-17 21:00:28,306 INFO L78 Accepts]: Start accepts. Automaton has 28838 states and 42434 transitions. Word has length 109 [2021-12-17 21:00:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:28,307 INFO L470 AbstractCegarLoop]: Abstraction has 28838 states and 42434 transitions. [2021-12-17 21:00:28,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28838 states and 42434 transitions. [2021-12-17 21:00:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 21:00:28,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:28,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:28,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:00:28,308 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2021-12-17 21:00:28,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:28,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168621479] [2021-12-17 21:00:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:28,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:28,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:28,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168621479] [2021-12-17 21:00:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168621479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:28,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:28,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:28,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867330476] [2021-12-17 21:00:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:28,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:00:28,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:00:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:28,358 INFO L87 Difference]: Start difference. First operand 28838 states and 42434 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:29,923 INFO L93 Difference]: Finished difference Result 56493 states and 82888 transitions. [2021-12-17 21:00:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:00:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-17 21:00:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:29,977 INFO L225 Difference]: With dead ends: 56493 [2021-12-17 21:00:29,978 INFO L226 Difference]: Without dead ends: 41642 [2021-12-17 21:00:29,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:00:29,990 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1549 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1852 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 [2021-12-17 21:00:29,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1852 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:00:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41642 states. [2021-12-17 21:00:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41642 to 41640. [2021-12-17 21:00:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41640 states, 41638 states have (on average 1.4587636293770114) internal successors, (60740), 41639 states have internal predecessors, (60740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41640 states to 41640 states and 60740 transitions. [2021-12-17 21:00:31,975 INFO L78 Accepts]: Start accepts. Automaton has 41640 states and 60740 transitions. Word has length 110 [2021-12-17 21:00:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:31,976 INFO L470 AbstractCegarLoop]: Abstraction has 41640 states and 60740 transitions. [2021-12-17 21:00:31,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41640 states and 60740 transitions. [2021-12-17 21:00:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 21:00:31,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:31,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:31,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:00:31,978 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1256716311, now seen corresponding path program 1 times [2021-12-17 21:00:31,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:31,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119647445] [2021-12-17 21:00:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:31,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:00:32,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:32,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119647445] [2021-12-17 21:00:32,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119647445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:32,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:32,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:00:32,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252241187] [2021-12-17 21:00:32,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:32,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:00:32,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:00:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:00:32,068 INFO L87 Difference]: Start difference. First operand 41640 states and 60740 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:00:37,876 INFO L93 Difference]: Finished difference Result 45405 states and 67746 transitions. [2021-12-17 21:00:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:00:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-17 21:00:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:00:37,938 INFO L225 Difference]: With dead ends: 45405 [2021-12-17 21:00:37,938 INFO L226 Difference]: Without dead ends: 43901 [2021-12-17 21:00:37,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:00:37,955 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 2670 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2670 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1540 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:00:37,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2670 Valid, 389 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1540 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-17 21:00:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43901 states. [2021-12-17 21:00:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43901 to 43893. [2021-12-17 21:00:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43893 states, 43891 states have (on average 1.4577931694424826) internal successors, (63984), 43892 states have internal predecessors, (63984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43893 states to 43893 states and 63984 transitions. [2021-12-17 21:00:40,364 INFO L78 Accepts]: Start accepts. Automaton has 43893 states and 63984 transitions. Word has length 121 [2021-12-17 21:00:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:00:40,364 INFO L470 AbstractCegarLoop]: Abstraction has 43893 states and 63984 transitions. [2021-12-17 21:00:40,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:00:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 43893 states and 63984 transitions. [2021-12-17 21:00:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 21:00:40,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:00:40,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:00:40,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:00:40,382 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:00:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:00:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash 635734382, now seen corresponding path program 1 times [2021-12-17 21:00:40,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:00:40,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558380879] [2021-12-17 21:00:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:00:40,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:00:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:00:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:00:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:00:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558380879] [2021-12-17 21:00:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558380879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:00:40,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:00:40,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:00:40,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585481532] [2021-12-17 21:00:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:00:40,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:00:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:00:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:00:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:00:40,489 INFO L87 Difference]: Start difference. First operand 43893 states and 63984 transitions. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)