./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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.3.ufo.BOUNDED-6.pals+Problem12_label04.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 70f2952113e7c5d0a919874ec9c1eb9d51aba80929eec498cecad1707afba9bd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:00:56,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:00:56,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:00:56,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:00:56,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:00:56,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:00:56,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:00:56,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:00:56,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:00:56,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:00:56,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:00:56,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:00:56,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:00:56,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:00:56,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:00:56,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:00:56,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:00:56,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:00:56,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:00:56,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:00:56,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:00:56,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:00:56,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:00:56,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:00:56,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:00:56,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:00:56,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:00:56,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:00:56,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:00:56,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:00:56,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:00:56,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:00:56,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:00:56,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:00:56,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:00:56,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:00:56,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:00:56,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:00:56,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:00:56,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:00:56,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:00:56,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:00:56,339 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:00:56,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:00:56,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:00:56,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:00:56,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:00:56,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:00:56,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:00:56,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:00:56,342 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:00:56,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:00:56,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:00:56,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:00:56,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:00:56,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:00:56,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:00:56,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:00:56,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:00:56,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:00:56,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:00:56,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:00:56,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:00:56,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:00:56,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:00:56,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:00:56,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:00:56,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:00:56,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:00:56,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:00:56,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:00:56,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:00:56,346 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:00:56,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:00:56,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:00:56,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:00:56,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70f2952113e7c5d0a919874ec9c1eb9d51aba80929eec498cecad1707afba9bd [2021-12-14 16:00:56,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:00:56,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:00:56,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:00:56,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:00:56,570 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:00:56,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label04.c [2021-12-14 16:00:56,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6789557e/d37183da456d4dbaa16616d467021e53/FLAGaa462cba7 [2021-12-14 16:00:57,191 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:00:57,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label04.c [2021-12-14 16:00:57,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6789557e/d37183da456d4dbaa16616d467021e53/FLAGaa462cba7 [2021-12-14 16:00:57,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6789557e/d37183da456d4dbaa16616d467021e53 [2021-12-14 16:00:57,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:00:57,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:00:57,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:00:57,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:00:57,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:00:57,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:00:57" (1/1) ... [2021-12-14 16:00:57,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0e191e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:57, skipping insertion in model container [2021-12-14 16:00:57,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:00:57" (1/1) ... [2021-12-14 16:00:57,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:00:57,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:00:57,821 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.3.ufo.BOUNDED-6.pals+Problem12_label04.c[6354,6367] [2021-12-14 16:00:57,877 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.3.ufo.BOUNDED-6.pals+Problem12_label04.c[13415,13428] [2021-12-14 16:00:58,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:00:58,392 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:00:58,431 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.3.ufo.BOUNDED-6.pals+Problem12_label04.c[6354,6367] [2021-12-14 16:00:58,437 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.3.ufo.BOUNDED-6.pals+Problem12_label04.c[13415,13428] [2021-12-14 16:00:58,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:00:58,730 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:00:58,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58 WrapperNode [2021-12-14 16:00:58,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:00:58,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:00:58,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:00:58,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:00:58,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:58,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,021 INFO L137 Inliner]: procedures = 33, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4976 [2021-12-14 16:00:59,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:00:59,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:00:59,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:00:59,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:00:59,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:00:59,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:00:59,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:00:59,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:00:59,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (1/1) ... [2021-12-14 16:00:59,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:00:59,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:00:59,502 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) [2021-12-14 16:00:59,521 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 [2021-12-14 16:00:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:00:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:00:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:00:59,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:00:59,627 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:00:59,628 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:01:02,634 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:01:02,651 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:01:02,651 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:01:02,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:02 BoogieIcfgContainer [2021-12-14 16:01:02,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:01:02,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:01:02,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:01:02,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:01:02,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:00:57" (1/3) ... [2021-12-14 16:01:02,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad528ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:02, skipping insertion in model container [2021-12-14 16:01:02,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:00:58" (2/3) ... [2021-12-14 16:01:02,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad528ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:02, skipping insertion in model container [2021-12-14 16:01:02,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:02" (3/3) ... [2021-12-14 16:01:02,660 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label04.c [2021-12-14 16:01:02,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:01:02,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:01:02,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:01:02,708 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 [2021-12-14 16:01:02,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:01:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:02,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:02,736 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] [2021-12-14 16:01:02,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-12-14 16:01:02,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997267503] [2021-12-14 16:01:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:02,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:02,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997267503] [2021-12-14 16:01:02,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997267503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:02,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:02,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:01:02,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339635957] [2021-12-14 16:01:02,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:02,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:01:02,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:02,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:01:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:01:02,948 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:03,041 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2021-12-14 16:01:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:01:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:03,058 INFO L225 Difference]: With dead ends: 1734 [2021-12-14 16:01:03,058 INFO L226 Difference]: Without dead ends: 812 [2021-12-14 16:01:03,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:01:03,066 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:03,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-12-14 16:01:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-12-14 16:01:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2021-12-14 16:01:03,129 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2021-12-14 16:01:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:03,129 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2021-12-14 16:01:03,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2021-12-14 16:01:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:03,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:03,131 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] [2021-12-14 16:01:03,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:01:03,132 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-12-14 16:01:03,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:03,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021200656] [2021-12-14 16:01:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:03,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:03,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:03,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021200656] [2021-12-14 16:01:03,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021200656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:03,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:03,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:03,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897812734] [2021-12-14 16:01:03,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:03,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:03,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:03,201 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:03,264 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2021-12-14 16:01:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:01:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:03,268 INFO L225 Difference]: With dead ends: 888 [2021-12-14 16:01:03,269 INFO L226 Difference]: Without dead ends: 848 [2021-12-14 16:01:03,269 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 [2021-12-14 16:01:03,270 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:03,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-12-14 16:01:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2021-12-14 16:01:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2021-12-14 16:01:03,290 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2021-12-14 16:01:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:03,290 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2021-12-14 16:01:03,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2021-12-14 16:01:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:03,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:03,293 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] [2021-12-14 16:01:03,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:01:03,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-12-14 16:01:03,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:03,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551093862] [2021-12-14 16:01:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:03,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:03,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551093862] [2021-12-14 16:01:03,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551093862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:03,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:03,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:03,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941199296] [2021-12-14 16:01:03,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:03,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:03,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:03,374 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:03,395 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2021-12-14 16:01:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:03,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:03,399 INFO L225 Difference]: With dead ends: 878 [2021-12-14 16:01:03,399 INFO L226 Difference]: Without dead ends: 842 [2021-12-14 16:01:03,401 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 [2021-12-14 16:01:03,404 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 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 [2021-12-14 16:01:03,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-14 16:01:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-12-14 16:01:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2021-12-14 16:01:03,421 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2021-12-14 16:01:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:03,421 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2021-12-14 16:01:03,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2021-12-14 16:01:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:03,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:03,424 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] [2021-12-14 16:01:03,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:01:03,424 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-12-14 16:01:03,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:03,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064881370] [2021-12-14 16:01:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:03,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:03,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:03,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064881370] [2021-12-14 16:01:03,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064881370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:03,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:03,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:03,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422197646] [2021-12-14 16:01:03,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:03,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:03,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:03,505 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:03,591 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2021-12-14 16:01:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:03,595 INFO L225 Difference]: With dead ends: 1224 [2021-12-14 16:01:03,595 INFO L226 Difference]: Without dead ends: 1160 [2021-12-14 16:01:03,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:03,602 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:03,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-12-14 16:01:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2021-12-14 16:01:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2021-12-14 16:01:03,624 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2021-12-14 16:01:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:03,625 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2021-12-14 16:01:03,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2021-12-14 16:01:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:03,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:03,628 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] [2021-12-14 16:01:03,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:01:03,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-12-14 16:01:03,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:03,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957871369] [2021-12-14 16:01:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:03,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:03,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957871369] [2021-12-14 16:01:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957871369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:03,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:03,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:03,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208383889] [2021-12-14 16:01:03,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:03,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:03,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:03,726 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:03,766 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2021-12-14 16:01:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:03,771 INFO L225 Difference]: With dead ends: 1089 [2021-12-14 16:01:03,771 INFO L226 Difference]: Without dead ends: 963 [2021-12-14 16:01:03,772 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 [2021-12-14 16:01:03,773 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:03,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-14 16:01:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-12-14 16:01:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2021-12-14 16:01:03,802 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2021-12-14 16:01:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:03,807 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2021-12-14 16:01:03,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2021-12-14 16:01:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:03,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:03,810 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] [2021-12-14 16:01:03,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:01:03,810 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-12-14 16:01:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:03,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470109087] [2021-12-14 16:01:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:03,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:03,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:03,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470109087] [2021-12-14 16:01:03,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470109087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:03,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:03,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:03,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582345758] [2021-12-14 16:01:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:03,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:03,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:03,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:03,934 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:04,066 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2021-12-14 16:01:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:04,070 INFO L225 Difference]: With dead ends: 1146 [2021-12-14 16:01:04,070 INFO L226 Difference]: Without dead ends: 963 [2021-12-14 16:01:04,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:04,071 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1528 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:04,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 1685 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:01:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-14 16:01:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-12-14 16:01:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2021-12-14 16:01:04,113 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2021-12-14 16:01:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:04,114 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2021-12-14 16:01:04,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2021-12-14 16:01:04,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:04,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:04,115 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] [2021-12-14 16:01:04,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:01:04,115 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-12-14 16:01:04,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486319490] [2021-12-14 16:01:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:04,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:04,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:04,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486319490] [2021-12-14 16:01:04,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486319490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:04,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:04,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:04,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579473528] [2021-12-14 16:01:04,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:04,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:04,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:04,169 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:04,225 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2021-12-14 16:01:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:04,229 INFO L225 Difference]: With dead ends: 1291 [2021-12-14 16:01:04,230 INFO L226 Difference]: Without dead ends: 1108 [2021-12-14 16:01:04,231 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 [2021-12-14 16:01:04,232 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 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 [2021-12-14 16:01:04,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-12-14 16:01:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2021-12-14 16:01:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2021-12-14 16:01:04,253 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2021-12-14 16:01:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:04,253 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2021-12-14 16:01:04,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2021-12-14 16:01:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:04,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:04,254 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] [2021-12-14 16:01:04,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:01:04,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-12-14 16:01:04,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140074990] [2021-12-14 16:01:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:04,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:04,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:04,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140074990] [2021-12-14 16:01:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140074990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:04,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:04,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:04,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613996253] [2021-12-14 16:01:04,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:04,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:04,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:04,292 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:04,322 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2021-12-14 16:01:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:04,327 INFO L225 Difference]: With dead ends: 1690 [2021-12-14 16:01:04,327 INFO L226 Difference]: Without dead ends: 1362 [2021-12-14 16:01:04,328 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 [2021-12-14 16:01:04,329 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 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 [2021-12-14 16:01:04,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-12-14 16:01:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2021-12-14 16:01:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2021-12-14 16:01:04,356 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2021-12-14 16:01:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:04,357 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2021-12-14 16:01:04,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2021-12-14 16:01:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:01:04,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:04,358 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] [2021-12-14 16:01:04,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:01:04,358 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-12-14 16:01:04,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:04,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674481519] [2021-12-14 16:01:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:04,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:04,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:04,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674481519] [2021-12-14 16:01:04,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674481519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:04,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:04,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:04,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104174426] [2021-12-14 16:01:04,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:04,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:04,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:04,400 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:04,460 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2021-12-14 16:01:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-14 16:01:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:04,466 INFO L225 Difference]: With dead ends: 1883 [2021-12-14 16:01:04,466 INFO L226 Difference]: Without dead ends: 1881 [2021-12-14 16:01:04,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:04,467 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:04,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-12-14 16:01:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2021-12-14 16:01:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2021-12-14 16:01:04,499 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2021-12-14 16:01:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:04,499 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2021-12-14 16:01:04,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2021-12-14 16:01:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 16:01:04,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:04,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:04,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:01:04,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 254202953, now seen corresponding path program 1 times [2021-12-14 16:01:04,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:04,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595985720] [2021-12-14 16:01:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:04,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:04,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595985720] [2021-12-14 16:01:04,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595985720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:04,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:04,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:01:04,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869774385] [2021-12-14 16:01:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:04,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:04,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:04,529 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:07,296 INFO L93 Difference]: Finished difference Result 2912 states and 5225 transitions. [2021-12-14 16:01:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-14 16:01:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:07,302 INFO L225 Difference]: With dead ends: 2912 [2021-12-14 16:01:07,303 INFO L226 Difference]: Without dead ends: 2159 [2021-12-14 16:01:07,304 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 [2021-12-14 16:01:07,304 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 832 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:07,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 155 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 16:01:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2021-12-14 16:01:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2159. [2021-12-14 16:01:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2157 states have (on average 1.727862772369031) internal successors, (3727), 2158 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3727 transitions. [2021-12-14 16:01:07,350 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3727 transitions. Word has length 61 [2021-12-14 16:01:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:07,350 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 3727 transitions. [2021-12-14 16:01:07,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3727 transitions. [2021-12-14 16:01:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:07,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:07,352 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] [2021-12-14 16:01:07,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:01:07,352 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-12-14 16:01:07,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:07,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775315221] [2021-12-14 16:01:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:07,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:01:07,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775315221] [2021-12-14 16:01:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775315221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:07,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:07,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:07,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756261680] [2021-12-14 16:01:07,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:07,407 INFO L87 Difference]: Start difference. First operand 2159 states and 3727 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:07,511 INFO L93 Difference]: Finished difference Result 4187 states and 6575 transitions. [2021-12-14 16:01:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:07,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-12-14 16:01:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:07,521 INFO L225 Difference]: With dead ends: 4187 [2021-12-14 16:01:07,522 INFO L226 Difference]: Without dead ends: 3557 [2021-12-14 16:01:07,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:07,524 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:07,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-12-14 16:01:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2021-12-14 16:01:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2785 states have (on average 1.6527827648114901) internal successors, (4603), 2786 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4603 transitions. [2021-12-14 16:01:07,592 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4603 transitions. Word has length 64 [2021-12-14 16:01:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:07,592 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4603 transitions. [2021-12-14 16:01:07,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4603 transitions. [2021-12-14 16:01:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:07,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:07,593 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] [2021-12-14 16:01:07,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:01:07,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-12-14 16:01:07,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:07,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557019290] [2021-12-14 16:01:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:07,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:01:07,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:07,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557019290] [2021-12-14 16:01:07,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557019290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:07,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:07,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:07,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611772436] [2021-12-14 16:01:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:07,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:07,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:07,633 INFO L87 Difference]: Start difference. First operand 2787 states and 4603 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:07,788 INFO L93 Difference]: Finished difference Result 4815 states and 7451 transitions. [2021-12-14 16:01:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-12-14 16:01:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:07,800 INFO L225 Difference]: With dead ends: 4815 [2021-12-14 16:01:07,801 INFO L226 Difference]: Without dead ends: 4185 [2021-12-14 16:01:07,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:07,804 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3065 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:07,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:01:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-12-14 16:01:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2021-12-14 16:01:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3729 states have (on average 1.584070796460177) internal successors, (5907), 3730 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5907 transitions. [2021-12-14 16:01:07,915 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5907 transitions. Word has length 64 [2021-12-14 16:01:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:07,915 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5907 transitions. [2021-12-14 16:01:07,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5907 transitions. [2021-12-14 16:01:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:07,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:07,916 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] [2021-12-14 16:01:07,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:01:07,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-12-14 16:01:07,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:07,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997306378] [2021-12-14 16:01:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:07,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:07,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:07,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997306378] [2021-12-14 16:01:07,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997306378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:07,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:07,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:07,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146193436] [2021-12-14 16:01:07,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:07,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:07,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:07,958 INFO L87 Difference]: Start difference. First operand 3731 states and 5907 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:08,104 INFO L93 Difference]: Finished difference Result 5083 states and 7831 transitions. [2021-12-14 16:01:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:08,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-12-14 16:01:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:08,127 INFO L225 Difference]: With dead ends: 5083 [2021-12-14 16:01:08,128 INFO L226 Difference]: Without dead ends: 4633 [2021-12-14 16:01:08,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:08,131 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3064 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:08,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3064 Valid, 3189 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-12-14 16:01:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2021-12-14 16:01:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.5654776155135264) internal successors, (6539), 4178 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6539 transitions. [2021-12-14 16:01:08,279 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6539 transitions. Word has length 64 [2021-12-14 16:01:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:08,279 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6539 transitions. [2021-12-14 16:01:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6539 transitions. [2021-12-14 16:01:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:01:08,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:08,285 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:08,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:01:08,285 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:08,286 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-12-14 16:01:08,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:08,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194214298] [2021-12-14 16:01:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:08,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:08,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:08,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194214298] [2021-12-14 16:01:08,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194214298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:08,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:08,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:08,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731804927] [2021-12-14 16:01:08,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:08,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:08,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:08,328 INFO L87 Difference]: Start difference. First operand 4179 states and 6539 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:08,425 INFO L93 Difference]: Finished difference Result 6831 states and 10241 transitions. [2021-12-14 16:01:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:08,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-14 16:01:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:08,432 INFO L225 Difference]: With dead ends: 6831 [2021-12-14 16:01:08,432 INFO L226 Difference]: Without dead ends: 4181 [2021-12-14 16:01:08,436 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 [2021-12-14 16:01:08,436 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 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 [2021-12-14 16:01:08,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-12-14 16:01:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2021-12-14 16:01:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.5535073018913095) internal successors, (6489), 4178 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6489 transitions. [2021-12-14 16:01:08,530 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6489 transitions. Word has length 65 [2021-12-14 16:01:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:08,531 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6489 transitions. [2021-12-14 16:01:08,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6489 transitions. [2021-12-14 16:01:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:01:08,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:08,532 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:08,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:01:08,532 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-12-14 16:01:08,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:08,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778496261] [2021-12-14 16:01:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:08,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:08,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778496261] [2021-12-14 16:01:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778496261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:08,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:08,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:08,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139455552] [2021-12-14 16:01:08,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:08,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:08,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:08,557 INFO L87 Difference]: Start difference. First operand 4179 states and 6489 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:08,602 INFO L93 Difference]: Finished difference Result 5507 states and 8316 transitions. [2021-12-14 16:01:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:08,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-14 16:01:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:08,606 INFO L225 Difference]: With dead ends: 5507 [2021-12-14 16:01:08,607 INFO L226 Difference]: Without dead ends: 2857 [2021-12-14 16:01:08,609 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 [2021-12-14 16:01:08,610 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 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 [2021-12-14 16:01:08,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-12-14 16:01:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2021-12-14 16:01:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2853 states have (on average 1.6260077111812128) internal successors, (4639), 2854 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4639 transitions. [2021-12-14 16:01:08,692 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4639 transitions. Word has length 65 [2021-12-14 16:01:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:08,692 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 4639 transitions. [2021-12-14 16:01:08,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4639 transitions. [2021-12-14 16:01:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:01:08,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:08,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:01:08,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-12-14 16:01:08,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:08,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871458569] [2021-12-14 16:01:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:08,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:08,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871458569] [2021-12-14 16:01:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871458569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:08,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55933857] [2021-12-14 16:01:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:08,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:08,940 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) [2021-12-14 16:01:08,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:01:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:01:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:09,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55933857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:09,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:09,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-14 16:01:09,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10849258] [2021-12-14 16:01:09,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:09,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 16:01:09,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:09,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 16:01:09,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-14 16:01:09,701 INFO L87 Difference]: Start difference. First operand 2855 states and 4639 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:16,694 INFO L93 Difference]: Finished difference Result 21660 states and 29646 transitions. [2021-12-14 16:01:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-12-14 16:01:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 65 [2021-12-14 16:01:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:16,726 INFO L225 Difference]: With dead ends: 21660 [2021-12-14 16:01:16,726 INFO L226 Difference]: Without dead ends: 20110 [2021-12-14 16:01:16,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17700 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5018, Invalid=36802, Unknown=0, NotChecked=0, Total=41820 [2021-12-14 16:01:16,742 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 19573 mSDsluCounter, 9885 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19573 SdHoareTripleChecker+Valid, 11467 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:16,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19573 Valid, 11467 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:01:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2021-12-14 16:01:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 13931. [2021-12-14 16:01:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13929 states have (on average 1.3766961016584105) internal successors, (19176), 13930 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 19176 transitions. [2021-12-14 16:01:17,336 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 19176 transitions. Word has length 65 [2021-12-14 16:01:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:17,336 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 19176 transitions. [2021-12-14 16:01:17,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 19176 transitions. [2021-12-14 16:01:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:17,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:17,337 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] [2021-12-14 16:01:17,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:01:17,554 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,SelfDestructingSolverStorable15 [2021-12-14 16:01:17,556 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-12-14 16:01:17,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453329071] [2021-12-14 16:01:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:17,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:17,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453329071] [2021-12-14 16:01:17,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453329071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762861950] [2021-12-14 16:01:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:17,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:17,672 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) [2021-12-14 16:01:17,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:01:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:01:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:18,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:18,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762861950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:18,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:18,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:01:18,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116350647] [2021-12-14 16:01:18,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:01:18,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:01:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:01:18,732 INFO L87 Difference]: Start difference. First operand 13931 states and 19176 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:20,725 INFO L93 Difference]: Finished difference Result 56272 states and 74094 transitions. [2021-12-14 16:01:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:01:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-14 16:01:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:20,801 INFO L225 Difference]: With dead ends: 56272 [2021-12-14 16:01:20,802 INFO L226 Difference]: Without dead ends: 46210 [2021-12-14 16:01:20,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 16:01:20,821 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 17330 mSDsluCounter, 4931 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17330 SdHoareTripleChecker+Valid, 6465 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:20,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17330 Valid, 6465 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:01:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46210 states. [2021-12-14 16:01:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46210 to 28584. [2021-12-14 16:01:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28584 states, 28582 states have (on average 1.338954586802883) internal successors, (38270), 28583 states have internal predecessors, (38270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 38270 transitions. [2021-12-14 16:01:22,160 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 38270 transitions. Word has length 66 [2021-12-14 16:01:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:22,161 INFO L470 AbstractCegarLoop]: Abstraction has 28584 states and 38270 transitions. [2021-12-14 16:01:22,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 38270 transitions. [2021-12-14 16:01:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:22,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:22,162 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:22,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:01:22,375 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,SelfDestructingSolverStorable16 [2021-12-14 16:01:22,376 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2021-12-14 16:01:22,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:22,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629770256] [2021-12-14 16:01:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:22,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:22,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629770256] [2021-12-14 16:01:22,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629770256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753535267] [2021-12-14 16:01:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:22,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:22,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:22,481 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) [2021-12-14 16:01:22,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:01:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:22,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:01:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:23,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:23,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753535267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:23,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:23,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:01:23,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171488154] [2021-12-14 16:01:23,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:23,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:01:23,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:01:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:01:23,498 INFO L87 Difference]: Start difference. First operand 28584 states and 38270 transitions. Second operand has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:30,490 INFO L93 Difference]: Finished difference Result 160017 states and 209245 transitions. [2021-12-14 16:01:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 16:01:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-14 16:01:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:30,764 INFO L225 Difference]: With dead ends: 160017 [2021-12-14 16:01:30,764 INFO L226 Difference]: Without dead ends: 132962 [2021-12-14 16:01:30,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 16:01:30,811 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 17412 mSDsluCounter, 6327 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17412 SdHoareTripleChecker+Valid, 7850 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:30,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17412 Valid, 7850 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:01:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132962 states. [2021-12-14 16:01:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132962 to 64538. [2021-12-14 16:01:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64538 states, 64536 states have (on average 1.3070999132267263) internal successors, (84355), 64537 states have internal predecessors, (84355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64538 states to 64538 states and 84355 transitions. [2021-12-14 16:01:35,269 INFO L78 Accepts]: Start accepts. Automaton has 64538 states and 84355 transitions. Word has length 66 [2021-12-14 16:01:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:35,269 INFO L470 AbstractCegarLoop]: Abstraction has 64538 states and 84355 transitions. [2021-12-14 16:01:35,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 64538 states and 84355 transitions. [2021-12-14 16:01:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:35,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:35,271 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] [2021-12-14 16:01:35,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 16:01:35,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 16:01:35,488 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-12-14 16:01:35,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:35,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821012686] [2021-12-14 16:01:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:35,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:35,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:35,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821012686] [2021-12-14 16:01:35,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821012686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:35,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:35,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:35,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617465083] [2021-12-14 16:01:35,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:35,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:35,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:35,525 INFO L87 Difference]: Start difference. First operand 64538 states and 84355 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) [2021-12-14 16:01:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:37,182 INFO L93 Difference]: Finished difference Result 92591 states and 120605 transitions. [2021-12-14 16:01:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:37,183 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 [2021-12-14 16:01:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:37,225 INFO L225 Difference]: With dead ends: 92591 [2021-12-14 16:01:37,226 INFO L226 Difference]: Without dead ends: 29582 [2021-12-14 16:01:37,258 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 [2021-12-14 16:01:37,259 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 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 [2021-12-14 16:01:37,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29582 states. [2021-12-14 16:01:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29582 to 26281. [2021-12-14 16:01:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26281 states, 26279 states have (on average 1.303626469804787) internal successors, (34258), 26280 states have internal predecessors, (34258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26281 states to 26281 states and 34258 transitions. [2021-12-14 16:01:38,573 INFO L78 Accepts]: Start accepts. Automaton has 26281 states and 34258 transitions. Word has length 66 [2021-12-14 16:01:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,573 INFO L470 AbstractCegarLoop]: Abstraction has 26281 states and 34258 transitions. [2021-12-14 16:01:38,574 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) [2021-12-14 16:01:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26281 states and 34258 transitions. [2021-12-14 16:01:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:38,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,575 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:38,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:01:38,576 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-12-14 16:01:38,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635937924] [2021-12-14 16:01:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:01:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635937924] [2021-12-14 16:01:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635937924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:38,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:38,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:38,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737113138] [2021-12-14 16:01:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:01:38,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:01:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:38,629 INFO L87 Difference]: Start difference. First operand 26281 states and 34258 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:39,862 INFO L93 Difference]: Finished difference Result 47092 states and 60819 transitions. [2021-12-14 16:01:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:01:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-12-14 16:01:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:39,893 INFO L225 Difference]: With dead ends: 47092 [2021-12-14 16:01:39,893 INFO L226 Difference]: Without dead ends: 22417 [2021-12-14 16:01:39,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:01:39,911 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4541 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4541 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:39,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4541 Valid, 2954 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22417 states. [2021-12-14 16:01:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22417 to 22417. [2021-12-14 16:01:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22417 states, 22415 states have (on average 1.2881106401962972) internal successors, (28873), 22416 states have internal predecessors, (28873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 28873 transitions. [2021-12-14 16:01:41,097 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 28873 transitions. Word has length 66 [2021-12-14 16:01:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:41,097 INFO L470 AbstractCegarLoop]: Abstraction has 22417 states and 28873 transitions. [2021-12-14 16:01:41,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 28873 transitions. [2021-12-14 16:01:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:41,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:41,098 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:01:41,099 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-12-14 16:01:41,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:41,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183366452] [2021-12-14 16:01:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:41,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 16:01:41,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:41,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183366452] [2021-12-14 16:01:41,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183366452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:41,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:41,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:41,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62634301] [2021-12-14 16:01:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:41,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:01:41,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:01:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:41,147 INFO L87 Difference]: Start difference. First operand 22417 states and 28873 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:42,188 INFO L93 Difference]: Finished difference Result 37943 states and 48264 transitions. [2021-12-14 16:01:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:01:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-12-14 16:01:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:42,212 INFO L225 Difference]: With dead ends: 37943 [2021-12-14 16:01:42,213 INFO L226 Difference]: Without dead ends: 17168 [2021-12-14 16:01:42,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:01:42,228 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4504 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:42,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 2959 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17168 states. [2021-12-14 16:01:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17168 to 17168. [2021-12-14 16:01:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17168 states, 17166 states have (on average 1.2792147267855063) internal successors, (21959), 17167 states have internal predecessors, (21959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 21959 transitions. [2021-12-14 16:01:43,204 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 21959 transitions. Word has length 66 [2021-12-14 16:01:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 21959 transitions. [2021-12-14 16:01:43,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 21959 transitions. [2021-12-14 16:01:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:43,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:43,206 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:43,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:01:43,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-12-14 16:01:43,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:43,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194165453] [2021-12-14 16:01:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:43,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 16:01:43,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194165453] [2021-12-14 16:01:43,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194165453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:43,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:43,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:43,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463990252] [2021-12-14 16:01:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:43,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:01:43,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:01:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:43,255 INFO L87 Difference]: Start difference. First operand 17168 states and 21959 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:44,014 INFO L93 Difference]: Finished difference Result 29362 states and 36984 transitions. [2021-12-14 16:01:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:01:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-14 16:01:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:44,035 INFO L225 Difference]: With dead ends: 29362 [2021-12-14 16:01:44,035 INFO L226 Difference]: Without dead ends: 13759 [2021-12-14 16:01:44,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:01:44,048 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4551 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4551 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:44,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4551 Valid, 2950 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2021-12-14 16:01:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13759. [2021-12-14 16:01:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13757 states have (on average 1.2823289961474158) internal successors, (17641), 13758 states have internal predecessors, (17641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 17641 transitions. [2021-12-14 16:01:44,799 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 17641 transitions. Word has length 66 [2021-12-14 16:01:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 13759 states and 17641 transitions. [2021-12-14 16:01:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 17641 transitions. [2021-12-14 16:01:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:01:44,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:44,800 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:44,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:01:44,800 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-12-14 16:01:44,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217821558] [2021-12-14 16:01:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:44,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:45,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217821558] [2021-12-14 16:01:45,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217821558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928293697] [2021-12-14 16:01:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:45,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:45,045 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) [2021-12-14 16:01:45,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:01:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 16:01:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates...