./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label33.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem11_label33.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 7166744474158954665024dc8c8b3712d72f905c129b3d2684427468d2506fe1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:38:12,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:38:12,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:38:12,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:38:12,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:38:12,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:38:12,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:38:12,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:38:12,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:38:12,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:38:12,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:38:12,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:38:12,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:38:12,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:38:12,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:38:12,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:38:12,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:38:12,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:38:12,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:38:12,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:38:12,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:38:12,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:38:12,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:38:12,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:38:12,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:38:12,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:38:12,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:38:12,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:38:12,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:38:12,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:38:12,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:38:12,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:38:12,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:38:12,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:38:12,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:38:12,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:38:12,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:38:12,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:38:12,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:38:12,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:38:12,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:38:12,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:38:12,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:38:12,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:38:12,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:38:12,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:38:12,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:38:12,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:38:12,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:38:12,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:38:12,624 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:38:12,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:38:12,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:38:12,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:38:12,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:38:12,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:38:12,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:38:12,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:38:12,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:38:12,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:38:12,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:38:12,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:38:12,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:38:12,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:38:12,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:38:12,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:38:12,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:38:12,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:38:12,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:38:12,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:38:12,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:38:12,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:38:12,628 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:38:12,628 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:38:12,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:38:12,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:38:12,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7166744474158954665024dc8c8b3712d72f905c129b3d2684427468d2506fe1 [2021-12-15 22:38:12,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:38:12,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:38:12,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:38:12,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:38:12,894 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:38:12,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label33.c [2021-12-15 22:38:12,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3e7203f/de59755bce66439bba3c4f2d78038c43/FLAGa7a4132cf [2021-12-15 22:38:13,555 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:38:13,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label33.c [2021-12-15 22:38:13,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3e7203f/de59755bce66439bba3c4f2d78038c43/FLAGa7a4132cf [2021-12-15 22:38:13,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3e7203f/de59755bce66439bba3c4f2d78038c43 [2021-12-15 22:38:13,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:38:13,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:38:13,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:38:13,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:38:13,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:38:13,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:38:13" (1/1) ... [2021-12-15 22:38:13,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c275f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:13, skipping insertion in model container [2021-12-15 22:38:13,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:38:13" (1/1) ... [2021-12-15 22:38:13,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:38:13,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:38:14,173 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label33.c[4121,4134] [2021-12-15 22:38:14,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:38:14,382 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:38:14,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label33.c[4121,4134] [2021-12-15 22:38:14,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:38:14,535 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:38:14,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14 WrapperNode [2021-12-15 22:38:14,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:38:14,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:38:14,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:38:14,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:38:14,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,704 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-15 22:38:14,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:38:14,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:38:14,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:38:14,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:38:14,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:38:14,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:38:14,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:38:14,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:38:14,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (1/1) ... [2021-12-15 22:38:14,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:38:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:38:14,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:38:14,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:38:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:38:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:38:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:38:14,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:38:15,037 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:38:15,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:38:16,486 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:38:16,497 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:38:16,497 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:38:16,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:38:16 BoogieIcfgContainer [2021-12-15 22:38:16,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:38:16,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:38:16,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:38:16,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:38:16,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:38:13" (1/3) ... [2021-12-15 22:38:16,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a13f9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:38:16, skipping insertion in model container [2021-12-15 22:38:16,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:38:14" (2/3) ... [2021-12-15 22:38:16,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a13f9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:38:16, skipping insertion in model container [2021-12-15 22:38:16,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:38:16" (3/3) ... [2021-12-15 22:38:16,506 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label33.c [2021-12-15 22:38:16,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:38:16,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:38:16,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:38:16,559 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:38:16,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:38:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 22:38:16,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:16,587 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] [2021-12-15 22:38:16,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-12-15 22:38:16,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:16,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775243753] [2021-12-15 22:38:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:16,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:16,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775243753] [2021-12-15 22:38:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775243753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:16,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:16,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:38:16,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589111154] [2021-12-15 22:38:16,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:16,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:16,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:16,846 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:17,833 INFO L93 Difference]: Finished difference Result 761 states and 1345 transitions. [2021-12-15 22:38:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-12-15 22:38:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:17,847 INFO L225 Difference]: With dead ends: 761 [2021-12-15 22:38:17,847 INFO L226 Difference]: Without dead ends: 413 [2021-12-15 22:38:17,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:17,856 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 200 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 222 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:38:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-15 22:38:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2021-12-15 22:38:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.453883495145631) internal successors, (599), 412 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 599 transitions. [2021-12-15 22:38:17,909 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 599 transitions. Word has length 28 [2021-12-15 22:38:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:17,911 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 599 transitions. [2021-12-15 22:38:17,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 599 transitions. [2021-12-15 22:38:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 22:38:17,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:17,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:17,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:38:17,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1836683206, now seen corresponding path program 1 times [2021-12-15 22:38:17,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:17,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391270737] [2021-12-15 22:38:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:17,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:18,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:18,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391270737] [2021-12-15 22:38:18,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391270737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:18,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:18,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:38:18,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853519440] [2021-12-15 22:38:18,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:18,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:18,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:18,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:18,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:18,004 INFO L87 Difference]: Start difference. First operand 413 states and 599 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:18,592 INFO L93 Difference]: Finished difference Result 1211 states and 1763 transitions. [2021-12-15 22:38:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:18,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 22:38:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:18,596 INFO L225 Difference]: With dead ends: 1211 [2021-12-15 22:38:18,596 INFO L226 Difference]: Without dead ends: 800 [2021-12-15 22:38:18,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:18,597 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 142 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:18,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 120 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-12-15 22:38:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 789. [2021-12-15 22:38:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.3743654822335025) internal successors, (1083), 788 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1083 transitions. [2021-12-15 22:38:18,658 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1083 transitions. Word has length 96 [2021-12-15 22:38:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:18,658 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1083 transitions. [2021-12-15 22:38:18,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1083 transitions. [2021-12-15 22:38:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 22:38:18,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:18,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:18,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:38:18,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 867693909, now seen corresponding path program 1 times [2021-12-15 22:38:18,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969652225] [2021-12-15 22:38:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:18,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:18,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969652225] [2021-12-15 22:38:18,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969652225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:18,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:18,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:18,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142313417] [2021-12-15 22:38:18,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:18,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:38:18,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:38:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:18,925 INFO L87 Difference]: Start difference. First operand 789 states and 1083 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:20,085 INFO L93 Difference]: Finished difference Result 2505 states and 3425 transitions. [2021-12-15 22:38:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:38:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 22:38:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:20,092 INFO L225 Difference]: With dead ends: 2505 [2021-12-15 22:38:20,092 INFO L226 Difference]: Without dead ends: 1718 [2021-12-15 22:38:20,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:38:20,094 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 483 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:20,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 218 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:38:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-12-15 22:38:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1714. [2021-12-15 22:38:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.2259194395796849) internal successors, (2100), 1713 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2100 transitions. [2021-12-15 22:38:20,148 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2100 transitions. Word has length 98 [2021-12-15 22:38:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:20,149 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2100 transitions. [2021-12-15 22:38:20,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2100 transitions. [2021-12-15 22:38:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-15 22:38:20,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:20,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:20,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:38:20,152 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1002850089, now seen corresponding path program 1 times [2021-12-15 22:38:20,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:20,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164714352] [2021-12-15 22:38:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:20,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:20,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:20,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164714352] [2021-12-15 22:38:20,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164714352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:20,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:20,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:20,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12851504] [2021-12-15 22:38:20,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:20,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:20,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:20,256 INFO L87 Difference]: Start difference. First operand 1714 states and 2100 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:21,096 INFO L93 Difference]: Finished difference Result 3991 states and 4983 transitions. [2021-12-15 22:38:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-12-15 22:38:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:21,103 INFO L225 Difference]: With dead ends: 3991 [2021-12-15 22:38:21,103 INFO L226 Difference]: Without dead ends: 2463 [2021-12-15 22:38:21,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:21,105 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 177 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:21,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 335 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:38:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-12-15 22:38:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2269. [2021-12-15 22:38:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 1.212962962962963) internal successors, (2751), 2268 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 2751 transitions. [2021-12-15 22:38:21,133 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 2751 transitions. Word has length 155 [2021-12-15 22:38:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:21,134 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 2751 transitions. [2021-12-15 22:38:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 2751 transitions. [2021-12-15 22:38:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-15 22:38:21,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:21,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:21,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:38:21,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash -85004655, now seen corresponding path program 1 times [2021-12-15 22:38:21,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467126301] [2021-12-15 22:38:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:21,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-15 22:38:21,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467126301] [2021-12-15 22:38:21,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467126301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:21,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:21,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:21,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513253651] [2021-12-15 22:38:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:21,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:21,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:21,257 INFO L87 Difference]: Start difference. First operand 2269 states and 2751 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:22,007 INFO L93 Difference]: Finished difference Result 5279 states and 6467 transitions. [2021-12-15 22:38:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 210 [2021-12-15 22:38:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:22,016 INFO L225 Difference]: With dead ends: 5279 [2021-12-15 22:38:22,016 INFO L226 Difference]: Without dead ends: 3012 [2021-12-15 22:38:22,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:22,024 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 169 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:22,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 387 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:38:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-12-15 22:38:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3005. [2021-12-15 22:38:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 3004 states have (on average 1.1947403462050599) internal successors, (3589), 3004 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 3589 transitions. [2021-12-15 22:38:22,064 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 3589 transitions. Word has length 210 [2021-12-15 22:38:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:22,065 INFO L470 AbstractCegarLoop]: Abstraction has 3005 states and 3589 transitions. [2021-12-15 22:38:22,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 3589 transitions. [2021-12-15 22:38:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 22:38:22,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:22,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:22,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:38:22,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2070045530, now seen corresponding path program 1 times [2021-12-15 22:38:22,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:22,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144697452] [2021-12-15 22:38:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:22,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:22,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144697452] [2021-12-15 22:38:22,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144697452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:22,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:22,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:22,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373328542] [2021-12-15 22:38:22,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:22,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:22,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:22,220 INFO L87 Difference]: Start difference. First operand 3005 states and 3589 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:22,900 INFO L93 Difference]: Finished difference Result 7495 states and 9103 transitions. [2021-12-15 22:38:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 237 [2021-12-15 22:38:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:22,911 INFO L225 Difference]: With dead ends: 7495 [2021-12-15 22:38:22,911 INFO L226 Difference]: Without dead ends: 4492 [2021-12-15 22:38:22,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:22,932 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 116 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:22,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 180 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4492 states. [2021-12-15 22:38:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4492 to 4490. [2021-12-15 22:38:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4489 states have (on average 1.1982624192470483) internal successors, (5379), 4489 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 5379 transitions. [2021-12-15 22:38:22,988 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 5379 transitions. Word has length 237 [2021-12-15 22:38:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:22,988 INFO L470 AbstractCegarLoop]: Abstraction has 4490 states and 5379 transitions. [2021-12-15 22:38:22,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 5379 transitions. [2021-12-15 22:38:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-15 22:38:22,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:22,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:22,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:38:22,991 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash 964138675, now seen corresponding path program 1 times [2021-12-15 22:38:22,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:22,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876898988] [2021-12-15 22:38:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:22,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:23,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876898988] [2021-12-15 22:38:23,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876898988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:23,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:23,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:38:23,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094056793] [2021-12-15 22:38:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:23,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:38:23,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:38:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:38:23,131 INFO L87 Difference]: Start difference. First operand 4490 states and 5379 transitions. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:24,491 INFO L93 Difference]: Finished difference Result 13417 states and 16581 transitions. [2021-12-15 22:38:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:38:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 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 247 [2021-12-15 22:38:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:24,511 INFO L225 Difference]: With dead ends: 13417 [2021-12-15 22:38:24,512 INFO L226 Difference]: Without dead ends: 8929 [2021-12-15 22:38:24,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:38:24,518 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 406 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:24,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 81 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:38:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-12-15 22:38:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 8730. [2021-12-15 22:38:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 8729 states have (on average 1.2049490205063582) internal successors, (10518), 8729 states have internal predecessors, (10518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 10518 transitions. [2021-12-15 22:38:24,652 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 10518 transitions. Word has length 247 [2021-12-15 22:38:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:24,653 INFO L470 AbstractCegarLoop]: Abstraction has 8730 states and 10518 transitions. [2021-12-15 22:38:24,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 10518 transitions. [2021-12-15 22:38:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 22:38:24,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:24,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:38:24,656 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1737482913, now seen corresponding path program 1 times [2021-12-15 22:38:24,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:24,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501645427] [2021-12-15 22:38:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:24,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:24,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:24,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501645427] [2021-12-15 22:38:24,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501645427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:24,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:24,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:24,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848221051] [2021-12-15 22:38:24,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:24,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:38:24,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:38:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:24,749 INFO L87 Difference]: Start difference. First operand 8730 states and 10518 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:25,819 INFO L93 Difference]: Finished difference Result 25595 states and 31274 transitions. [2021-12-15 22:38:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:38:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-12-15 22:38:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:25,859 INFO L225 Difference]: With dead ends: 25595 [2021-12-15 22:38:25,859 INFO L226 Difference]: Without dead ends: 17235 [2021-12-15 22:38:25,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:25,871 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 286 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:25,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 85 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:38:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17235 states. [2021-12-15 22:38:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17235 to 16866. [2021-12-15 22:38:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16866 states, 16865 states have (on average 1.2045656685443225) internal successors, (20315), 16865 states have internal predecessors, (20315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16866 states to 16866 states and 20315 transitions. [2021-12-15 22:38:26,196 INFO L78 Accepts]: Start accepts. Automaton has 16866 states and 20315 transitions. Word has length 252 [2021-12-15 22:38:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:26,196 INFO L470 AbstractCegarLoop]: Abstraction has 16866 states and 20315 transitions. [2021-12-15 22:38:26,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16866 states and 20315 transitions. [2021-12-15 22:38:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-15 22:38:26,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:26,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:26,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:38:26,201 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:26,201 INFO L85 PathProgramCache]: Analyzing trace with hash 129844146, now seen corresponding path program 1 times [2021-12-15 22:38:26,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012683506] [2021-12-15 22:38:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:26,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 22:38:26,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:26,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012683506] [2021-12-15 22:38:26,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012683506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:26,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231332511] [2021-12-15 22:38:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:26,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:26,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:26,317 INFO L87 Difference]: Start difference. First operand 16866 states and 20315 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:27,068 INFO L93 Difference]: Finished difference Result 37406 states and 45308 transitions. [2021-12-15 22:38:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:27,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 258 [2021-12-15 22:38:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:27,101 INFO L225 Difference]: With dead ends: 37406 [2021-12-15 22:38:27,101 INFO L226 Difference]: Without dead ends: 20911 [2021-12-15 22:38:27,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:27,116 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 191 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 353 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20911 states. [2021-12-15 22:38:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20911 to 20174. [2021-12-15 22:38:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20174 states, 20173 states have (on average 1.1969464135230259) internal successors, (24146), 20173 states have internal predecessors, (24146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20174 states to 20174 states and 24146 transitions. [2021-12-15 22:38:27,404 INFO L78 Accepts]: Start accepts. Automaton has 20174 states and 24146 transitions. Word has length 258 [2021-12-15 22:38:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:27,404 INFO L470 AbstractCegarLoop]: Abstraction has 20174 states and 24146 transitions. [2021-12-15 22:38:27,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 20174 states and 24146 transitions. [2021-12-15 22:38:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-15 22:38:27,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:27,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:27,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:38:27,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1804777207, now seen corresponding path program 1 times [2021-12-15 22:38:27,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:27,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542043939] [2021-12-15 22:38:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:27,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-15 22:38:27,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:27,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542043939] [2021-12-15 22:38:27,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542043939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:27,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:27,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:27,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130150897] [2021-12-15 22:38:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:27,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:27,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:27,492 INFO L87 Difference]: Start difference. First operand 20174 states and 24146 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:28,197 INFO L93 Difference]: Finished difference Result 40355 states and 48981 transitions. [2021-12-15 22:38:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 261 [2021-12-15 22:38:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:28,226 INFO L225 Difference]: With dead ends: 40355 [2021-12-15 22:38:28,226 INFO L226 Difference]: Without dead ends: 22402 [2021-12-15 22:38:28,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:28,239 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 187 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:28,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 174 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22402 states. [2021-12-15 22:38:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22402 to 20174. [2021-12-15 22:38:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20174 states, 20173 states have (on average 1.1969464135230259) internal successors, (24146), 20173 states have internal predecessors, (24146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20174 states to 20174 states and 24146 transitions. [2021-12-15 22:38:28,581 INFO L78 Accepts]: Start accepts. Automaton has 20174 states and 24146 transitions. Word has length 261 [2021-12-15 22:38:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:28,581 INFO L470 AbstractCegarLoop]: Abstraction has 20174 states and 24146 transitions. [2021-12-15 22:38:28,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20174 states and 24146 transitions. [2021-12-15 22:38:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-15 22:38:28,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:28,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:28,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:38:28,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -137733530, now seen corresponding path program 1 times [2021-12-15 22:38:28,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:28,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133571135] [2021-12-15 22:38:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:28,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 22:38:28,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:28,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133571135] [2021-12-15 22:38:28,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133571135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:28,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:28,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:28,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480694699] [2021-12-15 22:38:28,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:28,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:28,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:28,735 INFO L87 Difference]: Start difference. First operand 20174 states and 24146 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:29,673 INFO L93 Difference]: Finished difference Result 41991 states and 50887 transitions. [2021-12-15 22:38:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-12-15 22:38:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:29,752 INFO L225 Difference]: With dead ends: 41991 [2021-12-15 22:38:29,752 INFO L226 Difference]: Without dead ends: 24038 [2021-12-15 22:38:29,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:29,770 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 193 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:29,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 156 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:38:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24038 states. [2021-12-15 22:38:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24038 to 23670. [2021-12-15 22:38:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23670 states, 23669 states have (on average 1.1695466644133676) internal successors, (27682), 23669 states have internal predecessors, (27682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23670 states to 23670 states and 27682 transitions. [2021-12-15 22:38:30,123 INFO L78 Accepts]: Start accepts. Automaton has 23670 states and 27682 transitions. Word has length 264 [2021-12-15 22:38:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:30,124 INFO L470 AbstractCegarLoop]: Abstraction has 23670 states and 27682 transitions. [2021-12-15 22:38:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 23670 states and 27682 transitions. [2021-12-15 22:38:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-15 22:38:30,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:30,129 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:30,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:38:30,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash -279398603, now seen corresponding path program 1 times [2021-12-15 22:38:30,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:30,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019140479] [2021-12-15 22:38:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:30,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-15 22:38:30,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:30,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019140479] [2021-12-15 22:38:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019140479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:30,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:30,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:30,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184269628] [2021-12-15 22:38:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:30,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:30,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:30,222 INFO L87 Difference]: Start difference. First operand 23670 states and 27682 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:31,107 INFO L93 Difference]: Finished difference Result 49546 states and 58242 transitions. [2021-12-15 22:38:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 296 [2021-12-15 22:38:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:31,139 INFO L225 Difference]: With dead ends: 49546 [2021-12-15 22:38:31,140 INFO L226 Difference]: Without dead ends: 26247 [2021-12-15 22:38:31,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:31,152 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:31,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 155 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:38:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26247 states. [2021-12-15 22:38:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26247 to 23278. [2021-12-15 22:38:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23278 states, 23277 states have (on average 1.1598144090733342) internal successors, (26997), 23277 states have internal predecessors, (26997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23278 states to 23278 states and 26997 transitions. [2021-12-15 22:38:31,527 INFO L78 Accepts]: Start accepts. Automaton has 23278 states and 26997 transitions. Word has length 296 [2021-12-15 22:38:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:31,528 INFO L470 AbstractCegarLoop]: Abstraction has 23278 states and 26997 transitions. [2021-12-15 22:38:31,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 23278 states and 26997 transitions. [2021-12-15 22:38:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-12-15 22:38:31,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:31,559 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:38:31,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:38:31,560 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1079031194, now seen corresponding path program 1 times [2021-12-15 22:38:31,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:31,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342920809] [2021-12-15 22:38:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:31,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-15 22:38:31,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:31,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342920809] [2021-12-15 22:38:31,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342920809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:31,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:31,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:31,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901838868] [2021-12-15 22:38:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:31,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:31,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:31,754 INFO L87 Difference]: Start difference. First operand 23278 states and 26997 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:32,509 INFO L93 Difference]: Finished difference Result 47283 states and 55151 transitions. [2021-12-15 22:38:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 397 [2021-12-15 22:38:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:32,540 INFO L225 Difference]: With dead ends: 47283 [2021-12-15 22:38:32,541 INFO L226 Difference]: Without dead ends: 26222 [2021-12-15 22:38:32,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:32,557 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 121 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:32,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 318 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26222 states. [2021-12-15 22:38:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26222 to 23646. [2021-12-15 22:38:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23646 states, 23645 states have (on average 1.162148445760203) internal successors, (27479), 23645 states have internal predecessors, (27479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23646 states to 23646 states and 27479 transitions. [2021-12-15 22:38:32,886 INFO L78 Accepts]: Start accepts. Automaton has 23646 states and 27479 transitions. Word has length 397 [2021-12-15 22:38:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:32,886 INFO L470 AbstractCegarLoop]: Abstraction has 23646 states and 27479 transitions. [2021-12-15 22:38:32,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 23646 states and 27479 transitions. [2021-12-15 22:38:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-15 22:38:32,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:32,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:38:32,908 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash 145108911, now seen corresponding path program 1 times [2021-12-15 22:38:32,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:32,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072428734] [2021-12-15 22:38:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:32,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 22:38:33,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:33,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072428734] [2021-12-15 22:38:33,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072428734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:33,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:33,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 22:38:33,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983218966] [2021-12-15 22:38:33,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:33,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 22:38:33,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 22:38:33,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:38:33,152 INFO L87 Difference]: Start difference. First operand 23646 states and 27479 transitions. Second operand has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:34,581 INFO L93 Difference]: Finished difference Result 49895 states and 57889 transitions. [2021-12-15 22:38:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 22:38:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 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 398 [2021-12-15 22:38:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:34,615 INFO L225 Difference]: With dead ends: 49895 [2021-12-15 22:38:34,615 INFO L226 Difference]: Without dead ends: 26620 [2021-12-15 22:38:34,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 22:38:34,632 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 341 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:34,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 192 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:38:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26620 states. [2021-12-15 22:38:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26620 to 26037. [2021-12-15 22:38:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26037 states, 26036 states have (on average 1.1593946842833) internal successors, (30186), 26036 states have internal predecessors, (30186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26037 states to 26037 states and 30186 transitions. [2021-12-15 22:38:34,914 INFO L78 Accepts]: Start accepts. Automaton has 26037 states and 30186 transitions. Word has length 398 [2021-12-15 22:38:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:34,914 INFO L470 AbstractCegarLoop]: Abstraction has 26037 states and 30186 transitions. [2021-12-15 22:38:34,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 26037 states and 30186 transitions. [2021-12-15 22:38:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-12-15 22:38:34,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:34,940 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:34,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:38:34,941 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash 504044406, now seen corresponding path program 1 times [2021-12-15 22:38:34,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:34,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905743301] [2021-12-15 22:38:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:34,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 357 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 22:38:35,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:35,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905743301] [2021-12-15 22:38:35,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905743301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:38:35,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415448520] [2021-12-15 22:38:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:35,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:38:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:38:35,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:38:35,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:38:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:35,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 22:38:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:38:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 244 proven. 121 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 22:38:37,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:38:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 244 proven. 121 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 22:38:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415448520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:38:41,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:38:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 10 [2021-12-15 22:38:41,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601019100] [2021-12-15 22:38:41,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:38:41,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 22:38:41,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 22:38:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-15 22:38:41,570 INFO L87 Difference]: Start difference. First operand 26037 states and 30186 transitions. Second operand has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 10 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:45,955 INFO L93 Difference]: Finished difference Result 64010 states and 73677 transitions. [2021-12-15 22:38:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 22:38:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 10 states have internal predecessors, (951), 0 states have call successors, (0), 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 408 [2021-12-15 22:38:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:46,010 INFO L225 Difference]: With dead ends: 64010 [2021-12-15 22:38:46,010 INFO L226 Difference]: Without dead ends: 37031 [2021-12-15 22:38:46,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 812 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 22:38:46,033 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1499 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4185 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 5341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 4185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:46,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 227 Invalid, 5341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 4185 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 22:38:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37031 states. [2021-12-15 22:38:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37031 to 24191. [2021-12-15 22:38:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24191 states, 24190 states have (on average 1.1315006200909468) internal successors, (27371), 24190 states have internal predecessors, (27371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24191 states to 24191 states and 27371 transitions. [2021-12-15 22:38:46,388 INFO L78 Accepts]: Start accepts. Automaton has 24191 states and 27371 transitions. Word has length 408 [2021-12-15 22:38:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:46,389 INFO L470 AbstractCegarLoop]: Abstraction has 24191 states and 27371 transitions. [2021-12-15 22:38:46,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 10 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 24191 states and 27371 transitions. [2021-12-15 22:38:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-15 22:38:46,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:46,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:38:46,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:38:46,621 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,SelfDestructingSolverStorable14 [2021-12-15 22:38:46,622 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:46,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1509289490, now seen corresponding path program 1 times [2021-12-15 22:38:46,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:46,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696446130] [2021-12-15 22:38:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:46,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:38:46,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696446130] [2021-12-15 22:38:46,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696446130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:46,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:46,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:38:46,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806609816] [2021-12-15 22:38:46,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:46,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:38:46,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:46,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:38:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:46,799 INFO L87 Difference]: Start difference. First operand 24191 states and 27371 transitions. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:47,991 INFO L93 Difference]: Finished difference Result 50784 states and 57533 transitions. [2021-12-15 22:38:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:38:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 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 430 [2021-12-15 22:38:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:48,020 INFO L225 Difference]: With dead ends: 50784 [2021-12-15 22:38:48,020 INFO L226 Difference]: Without dead ends: 28437 [2021-12-15 22:38:48,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:48,041 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 192 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:48,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 66 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:38:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28437 states. [2021-12-15 22:38:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28437 to 27326. [2021-12-15 22:38:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27326 states, 27325 states have (on average 1.118316559926807) internal successors, (30558), 27325 states have internal predecessors, (30558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27326 states to 27326 states and 30558 transitions. [2021-12-15 22:38:48,306 INFO L78 Accepts]: Start accepts. Automaton has 27326 states and 30558 transitions. Word has length 430 [2021-12-15 22:38:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:48,307 INFO L470 AbstractCegarLoop]: Abstraction has 27326 states and 30558 transitions. [2021-12-15 22:38:48,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27326 states and 30558 transitions. [2021-12-15 22:38:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-12-15 22:38:48,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:48,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:38:48,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:38:48,320 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1406221149, now seen corresponding path program 1 times [2021-12-15 22:38:48,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:48,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448425352] [2021-12-15 22:38:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:48,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-15 22:38:48,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:48,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448425352] [2021-12-15 22:38:48,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448425352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:48,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:48,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:48,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515363206] [2021-12-15 22:38:48,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:48,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:48,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:48,486 INFO L87 Difference]: Start difference. First operand 27326 states and 30558 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:49,187 INFO L93 Difference]: Finished difference Result 55016 states and 61565 transitions. [2021-12-15 22:38:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:49,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 445 [2021-12-15 22:38:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:49,217 INFO L225 Difference]: With dead ends: 55016 [2021-12-15 22:38:49,217 INFO L226 Difference]: Without dead ends: 29166 [2021-12-15 22:38:49,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:49,235 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 126 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:49,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 301 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29166 states. [2021-12-15 22:38:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29166 to 26038. [2021-12-15 22:38:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26038 states, 26037 states have (on average 1.115643123247686) internal successors, (29048), 26037 states have internal predecessors, (29048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26038 states to 26038 states and 29048 transitions. [2021-12-15 22:38:49,483 INFO L78 Accepts]: Start accepts. Automaton has 26038 states and 29048 transitions. Word has length 445 [2021-12-15 22:38:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:49,483 INFO L470 AbstractCegarLoop]: Abstraction has 26038 states and 29048 transitions. [2021-12-15 22:38:49,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26038 states and 29048 transitions. [2021-12-15 22:38:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-12-15 22:38:49,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:49,496 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:49,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:38:49,497 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1451405169, now seen corresponding path program 1 times [2021-12-15 22:38:49,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945889507] [2021-12-15 22:38:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:49,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 578 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-15 22:38:49,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945889507] [2021-12-15 22:38:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945889507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:49,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:49,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:49,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517039883] [2021-12-15 22:38:49,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:49,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:38:49,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:38:49,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:49,596 INFO L87 Difference]: Start difference. First operand 26038 states and 29048 transitions. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:50,662 INFO L93 Difference]: Finished difference Result 50978 states and 56979 transitions. [2021-12-15 22:38:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:38:50,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 483 [2021-12-15 22:38:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:50,689 INFO L225 Difference]: With dead ends: 50978 [2021-12-15 22:38:50,689 INFO L226 Difference]: Without dead ends: 26784 [2021-12-15 22:38:50,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:50,707 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 228 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:50,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 116 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:38:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26784 states. [2021-12-15 22:38:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26784 to 26226. [2021-12-15 22:38:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26226 states, 26225 states have (on average 1.1150428979980935) internal successors, (29242), 26225 states have internal predecessors, (29242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26226 states to 26226 states and 29242 transitions. [2021-12-15 22:38:50,942 INFO L78 Accepts]: Start accepts. Automaton has 26226 states and 29242 transitions. Word has length 483 [2021-12-15 22:38:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:50,942 INFO L470 AbstractCegarLoop]: Abstraction has 26226 states and 29242 transitions. [2021-12-15 22:38:50,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 26226 states and 29242 transitions. [2021-12-15 22:38:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-12-15 22:38:50,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:50,953 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:50,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:38:50,953 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash 704365135, now seen corresponding path program 1 times [2021-12-15 22:38:50,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:50,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593700855] [2021-12-15 22:38:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:50,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 594 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 22:38:51,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:51,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593700855] [2021-12-15 22:38:51,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593700855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:51,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:51,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:51,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497503910] [2021-12-15 22:38:51,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:51,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:51,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:51,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:51,101 INFO L87 Difference]: Start difference. First operand 26226 states and 29242 transitions. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:51,893 INFO L93 Difference]: Finished difference Result 52091 states and 58090 transitions. [2021-12-15 22:38:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:51,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 488 [2021-12-15 22:38:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:51,929 INFO L225 Difference]: With dead ends: 52091 [2021-12-15 22:38:51,930 INFO L226 Difference]: Without dead ends: 26051 [2021-12-15 22:38:51,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:51,949 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 68 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:51,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 360 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:38:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26051 states. [2021-12-15 22:38:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26051 to 25857. [2021-12-15 22:38:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25857 states, 25856 states have (on average 1.093169863861386) internal successors, (28265), 25856 states have internal predecessors, (28265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25857 states to 25857 states and 28265 transitions. [2021-12-15 22:38:52,241 INFO L78 Accepts]: Start accepts. Automaton has 25857 states and 28265 transitions. Word has length 488 [2021-12-15 22:38:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:52,241 INFO L470 AbstractCegarLoop]: Abstraction has 25857 states and 28265 transitions. [2021-12-15 22:38:52,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 25857 states and 28265 transitions. [2021-12-15 22:38:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-15 22:38:52,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:52,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:52,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 22:38:52,255 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1167533331, now seen corresponding path program 1 times [2021-12-15 22:38:52,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:52,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634880262] [2021-12-15 22:38:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:52,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-15 22:38:52,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634880262] [2021-12-15 22:38:52,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634880262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:52,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:52,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:38:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268483443] [2021-12-15 22:38:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:52,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:52,364 INFO L87 Difference]: Start difference. First operand 25857 states and 28265 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:52,802 INFO L93 Difference]: Finished difference Result 48381 states and 52868 transitions. [2021-12-15 22:38:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 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 509 [2021-12-15 22:38:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:52,824 INFO L225 Difference]: With dead ends: 48381 [2021-12-15 22:38:52,824 INFO L226 Difference]: Without dead ends: 24368 [2021-12-15 22:38:52,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:52,841 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 176 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:52,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 36 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 22:38:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24368 states. [2021-12-15 22:38:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24368 to 24366. [2021-12-15 22:38:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24366 states, 24365 states have (on average 1.0887338395239072) internal successors, (26527), 24365 states have internal predecessors, (26527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24366 states to 24366 states and 26527 transitions. [2021-12-15 22:38:53,056 INFO L78 Accepts]: Start accepts. Automaton has 24366 states and 26527 transitions. Word has length 509 [2021-12-15 22:38:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:53,057 INFO L470 AbstractCegarLoop]: Abstraction has 24366 states and 26527 transitions. [2021-12-15 22:38:53,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24366 states and 26527 transitions. [2021-12-15 22:38:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2021-12-15 22:38:53,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:53,069 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:53,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:38:53,069 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 859115369, now seen corresponding path program 1 times [2021-12-15 22:38:53,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:53,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293335746] [2021-12-15 22:38:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:53,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-15 22:38:53,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293335746] [2021-12-15 22:38:53,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293335746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:53,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:53,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:53,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732564076] [2021-12-15 22:38:53,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:53,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:53,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:53,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:53,177 INFO L87 Difference]: Start difference. First operand 24366 states and 26527 transitions. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:53,689 INFO L93 Difference]: Finished difference Result 48912 states and 53285 transitions. [2021-12-15 22:38:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 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 525 [2021-12-15 22:38:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:53,709 INFO L225 Difference]: With dead ends: 48912 [2021-12-15 22:38:53,710 INFO L226 Difference]: Without dead ends: 21783 [2021-12-15 22:38:53,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:53,724 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:53,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 131 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:38:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21783 states. [2021-12-15 22:38:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 19206. [2021-12-15 22:38:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19206 states, 19205 states have (on average 1.0557667274147358) internal successors, (20276), 19205 states have internal predecessors, (20276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19206 states to 19206 states and 20276 transitions. [2021-12-15 22:38:53,894 INFO L78 Accepts]: Start accepts. Automaton has 19206 states and 20276 transitions. Word has length 525 [2021-12-15 22:38:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:53,895 INFO L470 AbstractCegarLoop]: Abstraction has 19206 states and 20276 transitions. [2021-12-15 22:38:53,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 19206 states and 20276 transitions. [2021-12-15 22:38:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-12-15 22:38:53,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:53,904 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:53,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:38:53,905 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1445337457, now seen corresponding path program 1 times [2021-12-15 22:38:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:53,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489622229] [2021-12-15 22:38:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:53,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-15 22:38:54,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489622229] [2021-12-15 22:38:54,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489622229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:54,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:54,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:54,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681457599] [2021-12-15 22:38:54,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:54,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:54,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:54,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:54,012 INFO L87 Difference]: Start difference. First operand 19206 states and 20276 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:54,513 INFO L93 Difference]: Finished difference Result 36383 states and 38435 transitions. [2021-12-15 22:38:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 564 [2021-12-15 22:38:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:54,529 INFO L225 Difference]: With dead ends: 36383 [2021-12-15 22:38:54,529 INFO L226 Difference]: Without dead ends: 19021 [2021-12-15 22:38:54,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:54,538 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 192 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:54,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 309 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:38:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-12-15 22:38:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 19021. [2021-12-15 22:38:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19021 states, 19020 states have (on average 1.0549421661409044) internal successors, (20065), 19020 states have internal predecessors, (20065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19021 states to 19021 states and 20065 transitions. [2021-12-15 22:38:54,695 INFO L78 Accepts]: Start accepts. Automaton has 19021 states and 20065 transitions. Word has length 564 [2021-12-15 22:38:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:54,695 INFO L470 AbstractCegarLoop]: Abstraction has 19021 states and 20065 transitions. [2021-12-15 22:38:54,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 19021 states and 20065 transitions. [2021-12-15 22:38:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2021-12-15 22:38:54,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:54,712 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:54,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:38:54,713 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash 688501029, now seen corresponding path program 1 times [2021-12-15 22:38:54,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:54,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944488728] [2021-12-15 22:38:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:54,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-12-15 22:38:54,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944488728] [2021-12-15 22:38:54,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944488728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:54,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:54,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:54,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954195318] [2021-12-15 22:38:54,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:54,852 INFO L87 Difference]: Start difference. First operand 19021 states and 20065 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:55,430 INFO L93 Difference]: Finished difference Result 38962 states and 41155 transitions. [2021-12-15 22:38:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 590 [2021-12-15 22:38:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:55,454 INFO L225 Difference]: With dead ends: 38962 [2021-12-15 22:38:55,455 INFO L226 Difference]: Without dead ends: 21785 [2021-12-15 22:38:55,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:55,469 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:55,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 61 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:38:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21785 states. [2021-12-15 22:38:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21785 to 19941. [2021-12-15 22:38:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19941 states, 19940 states have (on average 1.05320962888666) internal successors, (21001), 19940 states have internal predecessors, (21001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19941 states to 19941 states and 21001 transitions. [2021-12-15 22:38:55,691 INFO L78 Accepts]: Start accepts. Automaton has 19941 states and 21001 transitions. Word has length 590 [2021-12-15 22:38:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:55,692 INFO L470 AbstractCegarLoop]: Abstraction has 19941 states and 21001 transitions. [2021-12-15 22:38:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 19941 states and 21001 transitions. [2021-12-15 22:38:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2021-12-15 22:38:55,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:55,753 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:55,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 22:38:55,754 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash 54450342, now seen corresponding path program 1 times [2021-12-15 22:38:55,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:55,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843012628] [2021-12-15 22:38:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:55,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 889 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-15 22:38:56,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843012628] [2021-12-15 22:38:56,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843012628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:56,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:56,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:56,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904915582] [2021-12-15 22:38:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:56,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:38:56,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:38:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:56,055 INFO L87 Difference]: Start difference. First operand 19941 states and 21001 transitions. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:56,851 INFO L93 Difference]: Finished difference Result 37487 states and 39514 transitions. [2021-12-15 22:38:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:38:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 595 [2021-12-15 22:38:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:56,870 INFO L225 Difference]: With dead ends: 37487 [2021-12-15 22:38:56,870 INFO L226 Difference]: Without dead ends: 19206 [2021-12-15 22:38:56,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:56,883 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:56,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 66 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:38:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19206 states. [2021-12-15 22:38:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19206 to 17174. [2021-12-15 22:38:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17174 states, 17173 states have (on average 1.0513014615966925) internal successors, (18054), 17173 states have internal predecessors, (18054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17174 states to 17174 states and 18054 transitions. [2021-12-15 22:38:57,053 INFO L78 Accepts]: Start accepts. Automaton has 17174 states and 18054 transitions. Word has length 595 [2021-12-15 22:38:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:57,053 INFO L470 AbstractCegarLoop]: Abstraction has 17174 states and 18054 transitions. [2021-12-15 22:38:57,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 17174 states and 18054 transitions. [2021-12-15 22:38:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-12-15 22:38:57,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:57,062 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:57,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 22:38:57,063 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:57,079 INFO L85 PathProgramCache]: Analyzing trace with hash 905967947, now seen corresponding path program 1 times [2021-12-15 22:38:57,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:57,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229059886] [2021-12-15 22:38:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:57,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 1064 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-15 22:38:57,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:57,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229059886] [2021-12-15 22:38:57,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229059886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:57,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:57,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:38:57,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531089484] [2021-12-15 22:38:57,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:57,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:38:57,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:38:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:57,436 INFO L87 Difference]: Start difference. First operand 17174 states and 18054 transitions. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:58,278 INFO L93 Difference]: Finished difference Result 35826 states and 37748 transitions. [2021-12-15 22:38:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:38:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 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 601 [2021-12-15 22:38:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:58,296 INFO L225 Difference]: With dead ends: 35826 [2021-12-15 22:38:58,296 INFO L226 Difference]: Without dead ends: 18840 [2021-12-15 22:38:58,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:38:58,308 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 184 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:58,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 73 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:38:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18840 states. [2021-12-15 22:38:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18840 to 18834. [2021-12-15 22:38:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18834 states, 18833 states have (on average 1.0522487123665905) internal successors, (19817), 18833 states have internal predecessors, (19817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18834 states to 18834 states and 19817 transitions. [2021-12-15 22:38:58,501 INFO L78 Accepts]: Start accepts. Automaton has 18834 states and 19817 transitions. Word has length 601 [2021-12-15 22:38:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:58,501 INFO L470 AbstractCegarLoop]: Abstraction has 18834 states and 19817 transitions. [2021-12-15 22:38:58,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18834 states and 19817 transitions. [2021-12-15 22:38:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2021-12-15 22:38:58,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:38:58,519 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:38:58,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 22:38:58,520 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:38:58,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:38:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1278260760, now seen corresponding path program 1 times [2021-12-15 22:38:58,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:38:58,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788680253] [2021-12-15 22:38:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:38:58,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:38:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:38:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2021-12-15 22:38:58,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:38:58,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788680253] [2021-12-15 22:38:58,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788680253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:38:58,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:38:58,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:38:58,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268606720] [2021-12-15 22:38:58,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:38:58,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:38:58,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:38:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:38:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:58,770 INFO L87 Difference]: Start difference. First operand 18834 states and 19817 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:38:59,348 INFO L93 Difference]: Finished difference Result 18837 states and 19820 transitions. [2021-12-15 22:38:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:38:59,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 608 [2021-12-15 22:38:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:38:59,349 INFO L225 Difference]: With dead ends: 18837 [2021-12-15 22:38:59,349 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 22:38:59,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:38:59,356 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 162 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:38:59,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 319 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:38:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 22:38:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 22:38:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 22:38:59,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 608 [2021-12-15 22:38:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:38:59,358 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 22:38:59,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:38:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 22:38:59,359 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 22:38:59,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 22:38:59,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 22:38:59,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-15 22:39:06,534 WARN L227 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 1307 DAG size of output: 1291 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-15 22:39:11,793 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 1307 DAG size of output: 1291 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-15 22:39:19,077 WARN L227 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 1291 DAG size of output: 148 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)