./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.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 3eeb0f6f2b02b7e21805b04c6d73ace1817e7f4dc839756d5005dcaf1471275d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:06:10,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:06:10,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:06:10,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:06:10,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:06:10,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:06:10,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:06:10,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:06:10,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:06:10,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:06:10,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:06:10,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:06:10,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:06:10,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:06:10,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:06:10,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:06:10,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:06:10,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:06:10,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:06:10,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:06:10,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:06:10,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:06:10,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:06:10,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:06:10,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:06:10,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:06:10,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:06:10,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:06:10,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:06:10,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:06:10,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:06:10,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:06:10,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:06:10,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:06:10,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:06:10,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:06:10,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:06:10,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:06:10,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:06:10,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:06:10,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:06:10,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:06:10,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:06:10,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:06:10,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:06:10,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:06:10,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:06:10,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:06:10,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:06:10,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:06:10,447 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:06:10,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:06:10,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:06:10,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:06:10,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:06:10,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:06:10,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:06:10,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:06:10,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:06:10,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:06:10,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:06:10,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:06:10,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:06:10,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:06:10,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:06:10,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:06:10,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:06:10,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:06:10,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:06:10,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:06:10,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:06:10,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:06:10,452 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:06:10,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:06:10,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:06:10,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:06:10,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eeb0f6f2b02b7e21805b04c6d73ace1817e7f4dc839756d5005dcaf1471275d [2021-12-15 12:06:10,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:06:10,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:06:10,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:06:10,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:06:10,736 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:06:10,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-15 12:06:10,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed2ccc0f/4dd8d64779c74c41967444374a66d558/FLAG9433b4dae [2021-12-15 12:06:11,609 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:06:11,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-15 12:06:11,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed2ccc0f/4dd8d64779c74c41967444374a66d558/FLAG9433b4dae [2021-12-15 12:06:11,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed2ccc0f/4dd8d64779c74c41967444374a66d558 [2021-12-15 12:06:11,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:06:11,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:06:11,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:06:11,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:06:11,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:06:11,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:06:11" (1/1) ... [2021-12-15 12:06:11,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6ae308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:11, skipping insertion in model container [2021-12-15 12:06:11,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:06:11" (1/1) ... [2021-12-15 12:06:11,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:06:11,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:06:12,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c[11668,11681] [2021-12-15 12:06:12,244 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c[14005,14018] [2021-12-15 12:06:12,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:06:12,845 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:06:12,913 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c[11668,11681] [2021-12-15 12:06:12,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c[14005,14018] [2021-12-15 12:06:13,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:06:13,560 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:06:13,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13 WrapperNode [2021-12-15 12:06:13,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:06:13,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:06:13,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:06:13,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:06:13,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:13,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,063 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5088 [2021-12-15 12:06:14,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:06:14,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:06:14,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:06:14,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:06:14,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:06:14,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:06:14,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:06:14,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:06:14,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (1/1) ... [2021-12-15 12:06:14,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:06:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:06:14,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:06:14,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:06:14,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:06:14,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:06:14,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:06:14,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:06:14,832 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:06:14,833 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:06:18,601 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:06:18,629 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:06:18,643 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:06:18,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:06:18 BoogieIcfgContainer [2021-12-15 12:06:18,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:06:18,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:06:18,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:06:18,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:06:18,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:06:11" (1/3) ... [2021-12-15 12:06:18,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d75f1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:06:18, skipping insertion in model container [2021-12-15 12:06:18,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:06:13" (2/3) ... [2021-12-15 12:06:18,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d75f1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:06:18, skipping insertion in model container [2021-12-15 12:06:18,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:06:18" (3/3) ... [2021-12-15 12:06:18,655 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-15 12:06:18,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:06:18,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:06:18,762 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:06:18,769 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:06:18,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:06:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 12:06:18,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:18,812 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] [2021-12-15 12:06:18,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 118650789, now seen corresponding path program 1 times [2021-12-15 12:06:18,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:18,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110170921] [2021-12-15 12:06:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:18,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:19,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:19,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110170921] [2021-12-15 12:06:19,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110170921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:19,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:19,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:06:19,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954672755] [2021-12-15 12:06:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:19,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:19,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:19,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:19,102 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:22,367 INFO L93 Difference]: Finished difference Result 2538 states and 4880 transitions. [2021-12-15 12:06:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-15 12:06:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:22,398 INFO L225 Difference]: With dead ends: 2538 [2021-12-15 12:06:22,398 INFO L226 Difference]: Without dead ends: 1596 [2021-12-15 12:06:22,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:22,408 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 968 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:22,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 636 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 12:06:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-15 12:06:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-15 12:06:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.6430363864491844) internal successors, (2619), 1595 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2619 transitions. [2021-12-15 12:06:22,527 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2619 transitions. Word has length 20 [2021-12-15 12:06:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:22,527 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2619 transitions. [2021-12-15 12:06:22,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2619 transitions. [2021-12-15 12:06:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 12:06:22,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:22,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:22,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:06:22,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-15 12:06:22,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:22,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765795828] [2021-12-15 12:06:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:22,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:22,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765795828] [2021-12-15 12:06:22,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765795828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:22,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:22,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:06:22,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825898984] [2021-12-15 12:06:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:22,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:06:22,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:06:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:06:22,611 INFO L87 Difference]: Start difference. First operand 1596 states and 2619 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:22,682 INFO L93 Difference]: Finished difference Result 1654 states and 2708 transitions. [2021-12-15 12:06:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:06:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 12:06:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:22,689 INFO L225 Difference]: With dead ends: 1654 [2021-12-15 12:06:22,689 INFO L226 Difference]: Without dead ends: 1596 [2021-12-15 12:06:22,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:22,691 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:22,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-15 12:06:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-15 12:06:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.6235884567126726) internal successors, (2588), 1595 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2588 transitions. [2021-12-15 12:06:22,727 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2588 transitions. Word has length 34 [2021-12-15 12:06:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:22,728 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2588 transitions. [2021-12-15 12:06:22,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2588 transitions. [2021-12-15 12:06:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 12:06:22,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:22,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:22,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:06:22,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-15 12:06:22,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956930703] [2021-12-15 12:06:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:22,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:22,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956930703] [2021-12-15 12:06:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956930703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:22,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:22,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:22,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984491756] [2021-12-15 12:06:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:22,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:22,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:22,818 INFO L87 Difference]: Start difference. First operand 1596 states and 2588 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:22,855 INFO L93 Difference]: Finished difference Result 1698 states and 2748 transitions. [2021-12-15 12:06:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 12:06:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:22,863 INFO L225 Difference]: With dead ends: 1698 [2021-12-15 12:06:22,864 INFO L226 Difference]: Without dead ends: 1644 [2021-12-15 12:06:22,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:22,870 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:22,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-12-15 12:06:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1642. [2021-12-15 12:06:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1640 states have (on average 1.622560975609756) internal successors, (2661), 1641 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2661 transitions. [2021-12-15 12:06:22,915 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2661 transitions. Word has length 64 [2021-12-15 12:06:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2661 transitions. [2021-12-15 12:06:22,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2661 transitions. [2021-12-15 12:06:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 12:06:22,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:22,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:22,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:06:22,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-15 12:06:22,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839944830] [2021-12-15 12:06:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:22,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:23,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:23,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839944830] [2021-12-15 12:06:23,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839944830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:23,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:23,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:23,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159388676] [2021-12-15 12:06:23,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:23,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:23,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:23,045 INFO L87 Difference]: Start difference. First operand 1642 states and 2661 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:23,256 INFO L93 Difference]: Finished difference Result 2642 states and 4241 transitions. [2021-12-15 12:06:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 12:06:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 12:06:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:23,268 INFO L225 Difference]: With dead ends: 2642 [2021-12-15 12:06:23,269 INFO L226 Difference]: Without dead ends: 2542 [2021-12-15 12:06:23,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-15 12:06:23,279 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:23,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-12-15 12:06:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1740. [2021-12-15 12:06:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1738 states have (on average 1.619102416570771) internal successors, (2814), 1739 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2814 transitions. [2021-12-15 12:06:23,334 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2814 transitions. Word has length 64 [2021-12-15 12:06:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 2814 transitions. [2021-12-15 12:06:23,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2814 transitions. [2021-12-15 12:06:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:23,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:23,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:23,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:06:23,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-15 12:06:23,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:23,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131211542] [2021-12-15 12:06:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:23,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:23,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131211542] [2021-12-15 12:06:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131211542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:23,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:23,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968478713] [2021-12-15 12:06:23,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:23,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:23,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:23,469 INFO L87 Difference]: Start difference. First operand 1740 states and 2814 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:23,517 INFO L93 Difference]: Finished difference Result 2114 states and 3398 transitions. [2021-12-15 12:06:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 12:06:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:23,526 INFO L225 Difference]: With dead ends: 2114 [2021-12-15 12:06:23,527 INFO L226 Difference]: Without dead ends: 1916 [2021-12-15 12:06:23,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:23,529 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:23,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-15 12:06:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1910. [2021-12-15 12:06:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.610062893081761) internal successors, (3072), 1909 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3072 transitions. [2021-12-15 12:06:23,581 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3072 transitions. Word has length 66 [2021-12-15 12:06:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:23,581 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3072 transitions. [2021-12-15 12:06:23,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3072 transitions. [2021-12-15 12:06:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:23,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:23,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:23,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:06:23,583 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-15 12:06:23,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:23,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168022090] [2021-12-15 12:06:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:23,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:23,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168022090] [2021-12-15 12:06:23,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168022090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:23,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:23,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:23,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763388436] [2021-12-15 12:06:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:23,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:23,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:23,756 INFO L87 Difference]: Start difference. First operand 1910 states and 3072 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:23,895 INFO L93 Difference]: Finished difference Result 2280 states and 3642 transitions. [2021-12-15 12:06:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 12:06:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:23,901 INFO L225 Difference]: With dead ends: 2280 [2021-12-15 12:06:23,902 INFO L226 Difference]: Without dead ends: 1912 [2021-12-15 12:06:23,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-15 12:06:23,904 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3170 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3170 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:23,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3170 Valid, 1896 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-12-15 12:06:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1910. [2021-12-15 12:06:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.6079664570230607) internal successors, (3068), 1909 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3068 transitions. [2021-12-15 12:06:24,001 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3068 transitions. Word has length 66 [2021-12-15 12:06:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:24,001 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3068 transitions. [2021-12-15 12:06:24,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3068 transitions. [2021-12-15 12:06:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:24,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:24,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:06:24,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-15 12:06:24,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:24,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159442014] [2021-12-15 12:06:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:24,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:24,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:24,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159442014] [2021-12-15 12:06:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159442014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:24,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:24,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:24,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927761169] [2021-12-15 12:06:24,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:24,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:24,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:24,038 INFO L87 Difference]: Start difference. First operand 1910 states and 3068 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:24,084 INFO L93 Difference]: Finished difference Result 2598 states and 4118 transitions. [2021-12-15 12:06:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:24,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 12:06:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:24,093 INFO L225 Difference]: With dead ends: 2598 [2021-12-15 12:06:24,093 INFO L226 Difference]: Without dead ends: 2230 [2021-12-15 12:06:24,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:24,095 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:24,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-12-15 12:06:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2228. [2021-12-15 12:06:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2226 states have (on average 1.592093441150045) internal successors, (3544), 2227 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3544 transitions. [2021-12-15 12:06:24,156 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3544 transitions. Word has length 66 [2021-12-15 12:06:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:24,157 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 3544 transitions. [2021-12-15 12:06:24,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3544 transitions. [2021-12-15 12:06:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:24,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:24,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:06:24,159 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-15 12:06:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:24,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191199741] [2021-12-15 12:06:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:24,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:24,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:24,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191199741] [2021-12-15 12:06:24,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191199741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:24,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:24,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:24,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050212463] [2021-12-15 12:06:24,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:24,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:24,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:24,196 INFO L87 Difference]: Start difference. First operand 2228 states and 3544 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:24,261 INFO L93 Difference]: Finished difference Result 3504 states and 5466 transitions. [2021-12-15 12:06:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 12:06:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:24,270 INFO L225 Difference]: With dead ends: 3504 [2021-12-15 12:06:24,271 INFO L226 Difference]: Without dead ends: 2818 [2021-12-15 12:06:24,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:24,274 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:24,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-12-15 12:06:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2816. [2021-12-15 12:06:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2814 states have (on average 1.566453447050462) internal successors, (4408), 2815 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4408 transitions. [2021-12-15 12:06:24,360 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4408 transitions. Word has length 66 [2021-12-15 12:06:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:24,361 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4408 transitions. [2021-12-15 12:06:24,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4408 transitions. [2021-12-15 12:06:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:06:24,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:24,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:24,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:06:24,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-15 12:06:24,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:24,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798275753] [2021-12-15 12:06:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:24,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:24,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798275753] [2021-12-15 12:06:24,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798275753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:24,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:24,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:24,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642557500] [2021-12-15 12:06:24,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:24,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:24,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:24,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:24,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:24,399 INFO L87 Difference]: Start difference. First operand 2816 states and 4408 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:24,502 INFO L93 Difference]: Finished difference Result 5172 states and 7898 transitions. [2021-12-15 12:06:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 12:06:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:24,515 INFO L225 Difference]: With dead ends: 5172 [2021-12-15 12:06:24,516 INFO L226 Difference]: Without dead ends: 3898 [2021-12-15 12:06:24,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:24,519 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:24,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-12-15 12:06:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3896. [2021-12-15 12:06:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3894 states have (on average 1.5305598356445813) internal successors, (5960), 3895 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 5960 transitions. [2021-12-15 12:06:24,654 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 5960 transitions. Word has length 66 [2021-12-15 12:06:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:24,655 INFO L470 AbstractCegarLoop]: Abstraction has 3896 states and 5960 transitions. [2021-12-15 12:06:24,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 5960 transitions. [2021-12-15 12:06:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:06:24,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:24,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:06:24,657 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-15 12:06:24,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:24,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516760365] [2021-12-15 12:06:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:24,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:24,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:24,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516760365] [2021-12-15 12:06:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516760365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:24,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:24,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:06:24,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112404296] [2021-12-15 12:06:24,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:24,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:06:24,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:24,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:06:24,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:06:24,739 INFO L87 Difference]: Start difference. First operand 3896 states and 5960 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:25,084 INFO L93 Difference]: Finished difference Result 5654 states and 8494 transitions. [2021-12-15 12:06:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:06:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-15 12:06:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:25,108 INFO L225 Difference]: With dead ends: 5654 [2021-12-15 12:06:25,108 INFO L226 Difference]: Without dead ends: 5652 [2021-12-15 12:06:25,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 12:06:25,113 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 600 mSDsluCounter, 9089 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 10692 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:25,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 10692 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-12-15 12:06:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 3992. [2021-12-15 12:06:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3990 states have (on average 1.5137844611528821) internal successors, (6040), 3991 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6040 transitions. [2021-12-15 12:06:25,311 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6040 transitions. Word has length 67 [2021-12-15 12:06:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:25,311 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 6040 transitions. [2021-12-15 12:06:25,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6040 transitions. [2021-12-15 12:06:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:06:25,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:25,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:25,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:06:25,313 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-15 12:06:25,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:25,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363280785] [2021-12-15 12:06:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:25,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:25,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363280785] [2021-12-15 12:06:25,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363280785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:25,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:25,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:25,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090006426] [2021-12-15 12:06:25,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:25,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:25,352 INFO L87 Difference]: Start difference. First operand 3992 states and 6040 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:25,544 INFO L93 Difference]: Finished difference Result 6495 states and 9694 transitions. [2021-12-15 12:06:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 12:06:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:25,558 INFO L225 Difference]: With dead ends: 6495 [2021-12-15 12:06:25,558 INFO L226 Difference]: Without dead ends: 5116 [2021-12-15 12:06:25,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:25,564 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-12-15 12:06:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5114. [2021-12-15 12:06:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5112 states have (on average 1.4917840375586855) internal successors, (7626), 5113 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7626 transitions. [2021-12-15 12:06:25,848 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7626 transitions. Word has length 68 [2021-12-15 12:06:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:25,849 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 7626 transitions. [2021-12-15 12:06:25,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7626 transitions. [2021-12-15 12:06:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 12:06:25,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:25,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:25,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:06:25,853 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash 539606749, now seen corresponding path program 1 times [2021-12-15 12:06:25,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:25,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385939971] [2021-12-15 12:06:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:25,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:25,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385939971] [2021-12-15 12:06:25,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385939971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:06:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219164076] [2021-12-15 12:06:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:25,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:06:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:06:25,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:06:25,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 12:06:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 12:06:26,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:06:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:26,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 12:06:26,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219164076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:26,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 12:06:26,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 12:06:26,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652473108] [2021-12-15 12:06:26,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:26,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:26,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:06:26,213 INFO L87 Difference]: Start difference. First operand 5114 states and 7626 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:29,660 INFO L93 Difference]: Finished difference Result 8120 states and 12553 transitions. [2021-12-15 12:06:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-15 12:06:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:29,676 INFO L225 Difference]: With dead ends: 8120 [2021-12-15 12:06:29,676 INFO L226 Difference]: Without dead ends: 6616 [2021-12-15 12:06:29,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:06:29,682 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 903 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:29,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 597 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 12:06:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-12-15 12:06:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 6616. [2021-12-15 12:06:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6614 states have (on average 1.428182642878742) internal successors, (9446), 6615 states have internal predecessors, (9446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 9446 transitions. [2021-12-15 12:06:29,891 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 9446 transitions. Word has length 91 [2021-12-15 12:06:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:29,891 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 9446 transitions. [2021-12-15 12:06:29,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 9446 transitions. [2021-12-15 12:06:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:29,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:29,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:29,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:06:30,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 12:06:30,119 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash -32533465, now seen corresponding path program 1 times [2021-12-15 12:06:30,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:30,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407767279] [2021-12-15 12:06:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:30,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:30,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407767279] [2021-12-15 12:06:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407767279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:30,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:30,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741541812] [2021-12-15 12:06:30,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 12:06:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 12:06:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 12:06:30,203 INFO L87 Difference]: Start difference. First operand 6616 states and 9446 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:32,564 INFO L93 Difference]: Finished difference Result 10389 states and 14587 transitions. [2021-12-15 12:06:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:06:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 12:06:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:32,577 INFO L225 Difference]: With dead ends: 10389 [2021-12-15 12:06:32,577 INFO L226 Difference]: Without dead ends: 7383 [2021-12-15 12:06:32,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:06:32,582 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 1482 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:32,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 1889 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 12:06:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-12-15 12:06:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 7367. [2021-12-15 12:06:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7367 states, 7365 states have (on average 1.385336048879837) internal successors, (10203), 7366 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 10203 transitions. [2021-12-15 12:06:32,791 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 10203 transitions. Word has length 95 [2021-12-15 12:06:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:32,792 INFO L470 AbstractCegarLoop]: Abstraction has 7367 states and 10203 transitions. [2021-12-15 12:06:32,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 10203 transitions. [2021-12-15 12:06:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:32,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:32,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:06:32,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-15 12:06:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648702931] [2021-12-15 12:06:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:32,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 12:06:32,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:32,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648702931] [2021-12-15 12:06:32,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648702931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:32,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:32,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:32,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481984206] [2021-12-15 12:06:32,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:32,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:32,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:32,874 INFO L87 Difference]: Start difference. First operand 7367 states and 10203 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:33,606 INFO L93 Difference]: Finished difference Result 25939 states and 36801 transitions. [2021-12-15 12:06:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 12:06:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:33,645 INFO L225 Difference]: With dead ends: 25939 [2021-12-15 12:06:33,645 INFO L226 Difference]: Without dead ends: 22369 [2021-12-15 12:06:33,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:33,657 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6639 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6639 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:33,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6639 Valid, 3585 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22369 states. [2021-12-15 12:06:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22369 to 10935. [2021-12-15 12:06:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10935 states, 10933 states have (on average 1.3971462544589774) internal successors, (15275), 10934 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10935 states to 10935 states and 15275 transitions. [2021-12-15 12:06:34,176 INFO L78 Accepts]: Start accepts. Automaton has 10935 states and 15275 transitions. Word has length 95 [2021-12-15 12:06:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:34,176 INFO L470 AbstractCegarLoop]: Abstraction has 10935 states and 15275 transitions. [2021-12-15 12:06:34,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10935 states and 15275 transitions. [2021-12-15 12:06:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:34,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:34,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:34,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:06:34,180 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-15 12:06:34,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:34,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546643516] [2021-12-15 12:06:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:34,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 12:06:34,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546643516] [2021-12-15 12:06:34,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546643516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:34,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:34,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166247146] [2021-12-15 12:06:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:34,258 INFO L87 Difference]: Start difference. First operand 10935 states and 15275 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:35,330 INFO L93 Difference]: Finished difference Result 29507 states and 41873 transitions. [2021-12-15 12:06:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 12:06:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:35,379 INFO L225 Difference]: With dead ends: 29507 [2021-12-15 12:06:35,380 INFO L226 Difference]: Without dead ends: 25937 [2021-12-15 12:06:35,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:35,393 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6527 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6527 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:35,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6527 Valid, 3644 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2021-12-15 12:06:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 16295. [2021-12-15 12:06:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16295 states, 16293 states have (on average 1.4020131344749278) internal successors, (22843), 16294 states have internal predecessors, (22843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16295 states to 16295 states and 22843 transitions. [2021-12-15 12:06:36,115 INFO L78 Accepts]: Start accepts. Automaton has 16295 states and 22843 transitions. Word has length 95 [2021-12-15 12:06:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:36,115 INFO L470 AbstractCegarLoop]: Abstraction has 16295 states and 22843 transitions. [2021-12-15 12:06:36,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16295 states and 22843 transitions. [2021-12-15 12:06:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:36,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:36,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:36,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:06:36,120 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-15 12:06:36,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:36,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403708703] [2021-12-15 12:06:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:36,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 12:06:36,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403708703] [2021-12-15 12:06:36,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403708703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:36,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:36,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:36,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783409811] [2021-12-15 12:06:36,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:36,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:36,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:36,182 INFO L87 Difference]: Start difference. First operand 16295 states and 22843 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:37,428 INFO L93 Difference]: Finished difference Result 33075 states and 46945 transitions. [2021-12-15 12:06:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 12:06:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:37,478 INFO L225 Difference]: With dead ends: 33075 [2021-12-15 12:06:37,478 INFO L226 Difference]: Without dead ends: 29505 [2021-12-15 12:06:37,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:37,490 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6541 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6541 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:37,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6541 Valid, 3657 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29505 states. [2021-12-15 12:06:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29505 to 19863. [2021-12-15 12:06:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19863 states, 19861 states have (on average 1.405518352550224) internal successors, (27915), 19862 states have internal predecessors, (27915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19863 states to 19863 states and 27915 transitions. [2021-12-15 12:06:38,342 INFO L78 Accepts]: Start accepts. Automaton has 19863 states and 27915 transitions. Word has length 95 [2021-12-15 12:06:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:38,343 INFO L470 AbstractCegarLoop]: Abstraction has 19863 states and 27915 transitions. [2021-12-15 12:06:38,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 19863 states and 27915 transitions. [2021-12-15 12:06:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:06:38,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:38,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:38,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:06:38,347 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-15 12:06:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:38,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283657355] [2021-12-15 12:06:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:38,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:06:38,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283657355] [2021-12-15 12:06:38,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283657355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:38,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:38,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:38,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499883812] [2021-12-15 12:06:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:38,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:38,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:38,408 INFO L87 Difference]: Start difference. First operand 19863 states and 27915 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:40,058 INFO L93 Difference]: Finished difference Result 36643 states and 52017 transitions. [2021-12-15 12:06:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 12:06:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:40,104 INFO L225 Difference]: With dead ends: 36643 [2021-12-15 12:06:40,104 INFO L226 Difference]: Without dead ends: 33073 [2021-12-15 12:06:40,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:40,114 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6608 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6608 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:40,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6608 Valid, 3640 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:06:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33073 states. [2021-12-15 12:06:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33073 to 23431. [2021-12-15 12:06:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23431 states, 23429 states have (on average 1.4079559520252678) internal successors, (32987), 23430 states have internal predecessors, (32987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23431 states to 23431 states and 32987 transitions. [2021-12-15 12:06:41,100 INFO L78 Accepts]: Start accepts. Automaton has 23431 states and 32987 transitions. Word has length 95 [2021-12-15 12:06:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:41,101 INFO L470 AbstractCegarLoop]: Abstraction has 23431 states and 32987 transitions. [2021-12-15 12:06:41,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 23431 states and 32987 transitions. [2021-12-15 12:06:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 12:06:41,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:41,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:41,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:06:41,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-15 12:06:41,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393712541] [2021-12-15 12:06:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:41,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:41,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:41,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393712541] [2021-12-15 12:06:41,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393712541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:41,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:41,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:41,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381350075] [2021-12-15 12:06:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:41,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:41,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:41,149 INFO L87 Difference]: Start difference. First operand 23431 states and 32987 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:42,118 INFO L93 Difference]: Finished difference Result 37193 states and 52737 transitions. [2021-12-15 12:06:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 12:06:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:42,139 INFO L225 Difference]: With dead ends: 37193 [2021-12-15 12:06:42,139 INFO L226 Difference]: Without dead ends: 17559 [2021-12-15 12:06:42,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:42,159 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:42,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17559 states. [2021-12-15 12:06:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17559 to 17557. [2021-12-15 12:06:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17557 states, 17555 states have (on average 1.4043862147536315) internal successors, (24654), 17556 states have internal predecessors, (24654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17557 states to 17557 states and 24654 transitions. [2021-12-15 12:06:42,924 INFO L78 Accepts]: Start accepts. Automaton has 17557 states and 24654 transitions. Word has length 97 [2021-12-15 12:06:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:42,925 INFO L470 AbstractCegarLoop]: Abstraction has 17557 states and 24654 transitions. [2021-12-15 12:06:42,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17557 states and 24654 transitions. [2021-12-15 12:06:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 12:06:42,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:42,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:06:42,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-15 12:06:42,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816977957] [2021-12-15 12:06:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:42,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:06:42,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:42,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816977957] [2021-12-15 12:06:42,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816977957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:42,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:42,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 12:06:42,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391805745] [2021-12-15 12:06:42,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:42,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 12:06:42,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:42,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 12:06:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:06:42,977 INFO L87 Difference]: Start difference. First operand 17557 states and 24654 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:43,944 INFO L93 Difference]: Finished difference Result 30049 states and 42580 transitions. [2021-12-15 12:06:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:06:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 12:06:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:43,985 INFO L225 Difference]: With dead ends: 30049 [2021-12-15 12:06:43,985 INFO L226 Difference]: Without dead ends: 27551 [2021-12-15 12:06:43,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:06:43,998 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6590 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6590 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:43,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6590 Valid, 3594 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27551 states. [2021-12-15 12:06:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27551 to 20053. [2021-12-15 12:06:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20053 states, 20051 states have (on average 1.4067128821505162) internal successors, (28206), 20052 states have internal predecessors, (28206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20053 states to 20053 states and 28206 transitions. [2021-12-15 12:06:44,988 INFO L78 Accepts]: Start accepts. Automaton has 20053 states and 28206 transitions. Word has length 97 [2021-12-15 12:06:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:44,988 INFO L470 AbstractCegarLoop]: Abstraction has 20053 states and 28206 transitions. [2021-12-15 12:06:44,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 20053 states and 28206 transitions. [2021-12-15 12:06:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:45,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:45,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:45,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:06:45,002 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-15 12:06:45,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:45,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218072879] [2021-12-15 12:06:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:45,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:45,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218072879] [2021-12-15 12:06:45,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218072879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:45,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:45,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:45,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322281037] [2021-12-15 12:06:45,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:45,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:45,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:45,031 INFO L87 Difference]: Start difference. First operand 20053 states and 28206 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:45,386 INFO L93 Difference]: Finished difference Result 28169 states and 39752 transitions. [2021-12-15 12:06:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:45,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:45,402 INFO L225 Difference]: With dead ends: 28169 [2021-12-15 12:06:45,403 INFO L226 Difference]: Without dead ends: 11943 [2021-12-15 12:06:45,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:45,418 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:45,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11943 states. [2021-12-15 12:06:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11943 to 11941. [2021-12-15 12:06:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11939 states have (on average 1.3868833235614373) internal successors, (16558), 11940 states have internal predecessors, (16558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 16558 transitions. [2021-12-15 12:06:45,901 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 16558 transitions. Word has length 98 [2021-12-15 12:06:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:45,901 INFO L470 AbstractCegarLoop]: Abstraction has 11941 states and 16558 transitions. [2021-12-15 12:06:45,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 16558 transitions. [2021-12-15 12:06:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:45,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:45,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:45,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 12:06:45,904 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:45,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-15 12:06:45,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:45,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970949586] [2021-12-15 12:06:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:45,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:45,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970949586] [2021-12-15 12:06:45,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970949586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:45,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:45,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:45,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189217687] [2021-12-15 12:06:45,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:45,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:45,948 INFO L87 Difference]: Start difference. First operand 11941 states and 16558 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:46,193 INFO L93 Difference]: Finished difference Result 16001 states and 22280 transitions. [2021-12-15 12:06:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:46,202 INFO L225 Difference]: With dead ends: 16001 [2021-12-15 12:06:46,203 INFO L226 Difference]: Without dead ends: 7887 [2021-12-15 12:06:46,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:46,210 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:46,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7887 states. [2021-12-15 12:06:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7887 to 7885. [2021-12-15 12:06:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7885 states, 7883 states have (on average 1.3682608144107573) internal successors, (10786), 7884 states have internal predecessors, (10786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7885 states to 7885 states and 10786 transitions. [2021-12-15 12:06:46,481 INFO L78 Accepts]: Start accepts. Automaton has 7885 states and 10786 transitions. Word has length 98 [2021-12-15 12:06:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 7885 states and 10786 transitions. [2021-12-15 12:06:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7885 states and 10786 transitions. [2021-12-15 12:06:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:46,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:46,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:46,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 12:06:46,484 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-15 12:06:46,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:46,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368011881] [2021-12-15 12:06:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:46,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:46,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:46,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368011881] [2021-12-15 12:06:46,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368011881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:06:46,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:06:46,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:06:46,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59062063] [2021-12-15 12:06:46,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:06:46,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:06:46,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:06:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:46,537 INFO L87 Difference]: Start difference. First operand 7885 states and 10786 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:46,671 INFO L93 Difference]: Finished difference Result 9917 states and 13622 transitions. [2021-12-15 12:06:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:06:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:46,677 INFO L225 Difference]: With dead ends: 9917 [2021-12-15 12:06:46,677 INFO L226 Difference]: Without dead ends: 5859 [2021-12-15 12:06:46,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:06:46,681 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:46,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:06:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-12-15 12:06:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5857. [2021-12-15 12:06:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5857 states, 5855 states have (on average 1.3537147736976942) internal successors, (7926), 5856 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 7926 transitions. [2021-12-15 12:06:46,839 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 7926 transitions. Word has length 98 [2021-12-15 12:06:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:46,839 INFO L470 AbstractCegarLoop]: Abstraction has 5857 states and 7926 transitions. [2021-12-15 12:06:46,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 7926 transitions. [2021-12-15 12:06:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 12:06:46,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:46,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 12:06:46,841 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-15 12:06:46,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521244004] [2021-12-15 12:06:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:46,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:46,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521244004] [2021-12-15 12:06:46,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521244004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:06:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112992490] [2021-12-15 12:06:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:46,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:06:46,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:06:46,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:06:46,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 12:06:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 12:06:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:06:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:06:47,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:06:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:06:47,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112992490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:06:47,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:06:47,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-15 12:06:47,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946796227] [2021-12-15 12:06:47,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:06:47,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 12:06:47,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 12:06:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-15 12:06:47,632 INFO L87 Difference]: Start difference. First operand 5857 states and 7926 transitions. Second operand has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:50,963 INFO L93 Difference]: Finished difference Result 27479 states and 37540 transitions. [2021-12-15 12:06:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 12:06:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 12:06:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:51,013 INFO L225 Difference]: With dead ends: 27479 [2021-12-15 12:06:51,013 INFO L226 Difference]: Without dead ends: 25449 [2021-12-15 12:06:51,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 12:06:51,026 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 16014 mSDsluCounter, 5462 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16014 SdHoareTripleChecker+Valid, 7055 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:51,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16014 Valid, 7055 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 12:06:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25449 states. [2021-12-15 12:06:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25449 to 17209. [2021-12-15 12:06:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17209 states, 17207 states have (on average 1.3239379322368803) internal successors, (22781), 17208 states have internal predecessors, (22781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17209 states to 17209 states and 22781 transitions. [2021-12-15 12:06:52,117 INFO L78 Accepts]: Start accepts. Automaton has 17209 states and 22781 transitions. Word has length 98 [2021-12-15 12:06:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:06:52,117 INFO L470 AbstractCegarLoop]: Abstraction has 17209 states and 22781 transitions. [2021-12-15 12:06:52,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 17209 states and 22781 transitions. [2021-12-15 12:06:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 12:06:52,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:06:52,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:06:52,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 12:06:52,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 12:06:52,335 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:06:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:06:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1125120587, now seen corresponding path program 1 times [2021-12-15 12:06:52,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:06:52,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382147051] [2021-12-15 12:06:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:52,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:06:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:52,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:06:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382147051] [2021-12-15 12:06:52,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382147051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:06:52,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933666154] [2021-12-15 12:06:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:06:52,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:06:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:06:52,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:06:52,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 12:06:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:06:52,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 12:06:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:06:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:53,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:06:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:06:53,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933666154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:06:53,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:06:53,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-15 12:06:53,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453117862] [2021-12-15 12:06:53,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:06:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 12:06:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:06:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 12:06:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-15 12:06:53,954 INFO L87 Difference]: Start difference. First operand 17209 states and 22781 transitions. Second operand has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:06:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:06:58,197 INFO L93 Difference]: Finished difference Result 74090 states and 97326 transitions. [2021-12-15 12:06:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 12:06:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-15 12:06:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:06:58,298 INFO L225 Difference]: With dead ends: 74090 [2021-12-15 12:06:58,299 INFO L226 Difference]: Without dead ends: 61193 [2021-12-15 12:06:58,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1342, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 12:06:58,327 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 10039 mSDsluCounter, 5339 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10039 SdHoareTripleChecker+Valid, 6896 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 12:06:58,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10039 Valid, 6896 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 12:06:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61193 states. [2021-12-15 12:07:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61193 to 38915. [2021-12-15 12:07:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38915 states, 38913 states have (on average 1.3076606789504792) internal successors, (50885), 38914 states have internal predecessors, (50885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38915 states to 38915 states and 50885 transitions. [2021-12-15 12:07:00,608 INFO L78 Accepts]: Start accepts. Automaton has 38915 states and 50885 transitions. Word has length 99 [2021-12-15 12:07:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:07:00,608 INFO L470 AbstractCegarLoop]: Abstraction has 38915 states and 50885 transitions. [2021-12-15 12:07:00,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 38915 states and 50885 transitions. [2021-12-15 12:07:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 12:07:00,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:00,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:07:00,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 12:07:00,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:07:00,813 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash 110338453, now seen corresponding path program 1 times [2021-12-15 12:07:00,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:00,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000096757] [2021-12-15 12:07:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:00,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:00,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:00,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000096757] [2021-12-15 12:07:00,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000096757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:07:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148653801] [2021-12-15 12:07:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:00,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:07:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:07:01,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:07:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 12:07:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:07:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:07:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:01,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:07:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:02,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148653801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:07:02,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:07:02,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-15 12:07:02,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079175339] [2021-12-15 12:07:02,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:07:02,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 12:07:02,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:07:02,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 12:07:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-12-15 12:07:02,455 INFO L87 Difference]: Start difference. First operand 38915 states and 50885 transitions. Second operand has 30 states, 30 states have (on average 8.966666666666667) internal successors, (269), 29 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)