./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2adccaef3712b0295c8f7cfd3e1ed73b8b25a6bf1026bcea89334476cfd41a2b --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:29:26,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:29:26,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:29:26,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:29:26,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:29:26,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:29:26,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:29:26,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:29:26,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:29:26,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:29:26,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:29:26,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:29:26,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:29:26,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:29:26,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:29:26,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:29:26,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:29:26,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:29:26,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:29:26,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:29:26,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:29:26,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:29:26,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:29:26,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:29:26,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:29:26,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:29:26,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:29:26,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:29:26,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:29:26,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:29:26,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:29:26,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:29:26,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:29:26,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:29:26,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:29:26,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:29:26,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:29:26,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:29:26,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:29:26,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:29:26,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:29:26,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:29:26,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:29:26,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:29:26,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:29:26,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:29:26,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:29:26,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:29:26,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:29:26,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:29:26,375 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:29:26,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:29:26,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:29:26,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:29:26,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:29:26,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:29:26,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:29:26,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:29:26,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:29:26,376 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:29:26,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:29:26,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:29:26,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:29:26,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:29:26,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:29:26,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:29:26,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:29:26,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:29:26,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:29:26,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:29:26,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:29:26,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:29:26,379 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:29:26,379 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:29:26,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:29:26,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:29:26,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2adccaef3712b0295c8f7cfd3e1ed73b8b25a6bf1026bcea89334476cfd41a2b [2021-12-14 12:29:26,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:29:26,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:29:26,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:29:26,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:29:26,568 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:29:26,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2021-12-14 12:29:26,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6fefb85d/39bcb6d670094296a5b6709ac38851da/FLAG7a1f0dc14 [2021-12-14 12:29:27,116 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:29:27,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2021-12-14 12:29:27,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6fefb85d/39bcb6d670094296a5b6709ac38851da/FLAG7a1f0dc14 [2021-12-14 12:29:27,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6fefb85d/39bcb6d670094296a5b6709ac38851da [2021-12-14 12:29:27,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:29:27,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:29:27,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:29:27,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:29:27,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:29:27,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:29:27" (1/1) ... [2021-12-14 12:29:27,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4ca9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:27, skipping insertion in model container [2021-12-14 12:29:27,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:29:27" (1/1) ... [2021-12-14 12:29:27,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:29:27,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:29:27,688 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/Problem13_label04.c[2611,2624] [2021-12-14 12:29:28,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:29:28,363 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:29:28,383 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/Problem13_label04.c[2611,2624] [2021-12-14 12:29:28,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:29:28,752 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:29:28,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28 WrapperNode [2021-12-14 12:29:28,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:29:28,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:29:28,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:29:28,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:29:28,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:28,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,171 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-14 12:29:29,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:29:29,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:29:29,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:29:29,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:29:29,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:29:29,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:29:29,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:29:29,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:29:29,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (1/1) ... [2021-12-14 12:29:29,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:29:29,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:29:29,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 12:29:29,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 12:29:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:29:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:29:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:29:29,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:29:29,856 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:29:29,857 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:29:33,095 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:29:33,115 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:29:33,115 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 12:29:33,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:29:33 BoogieIcfgContainer [2021-12-14 12:29:33,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:29:33,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:29:33,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:29:33,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:29:33,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:29:27" (1/3) ... [2021-12-14 12:29:33,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172e9149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:29:33, skipping insertion in model container [2021-12-14 12:29:33,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:28" (2/3) ... [2021-12-14 12:29:33,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172e9149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:29:33, skipping insertion in model container [2021-12-14 12:29:33,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:29:33" (3/3) ... [2021-12-14 12:29:33,127 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label04.c [2021-12-14 12:29:33,131 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:29:33,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:29:33,180 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:29:33,187 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 12:29:33,187 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:29:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 12:29:33,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:33,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:33,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2021-12-14 12:29:33,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:33,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963105731] [2021-12-14 12:29:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:33,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:29:33,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963105731] [2021-12-14 12:29:33,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963105731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:33,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:33,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:29:33,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106244005] [2021-12-14 12:29:33,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:33,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:33,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:33,413 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:37,193 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-14 12:29:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-14 12:29:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:37,219 INFO L225 Difference]: With dead ends: 3147 [2021-12-14 12:29:37,219 INFO L226 Difference]: Without dead ends: 1964 [2021-12-14 12:29:37,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:37,227 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1163 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:37,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-14 12:29:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-14 12:29:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-14 12:29:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-14 12:29:37,303 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 16 [2021-12-14 12:29:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:37,304 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-14 12:29:37,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:37,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-14 12:29:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 12:29:37,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:37,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:37,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:29:37,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash -9926837, now seen corresponding path program 1 times [2021-12-14 12:29:37,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675602060] [2021-12-14 12:29:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:37,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:29:37,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675602060] [2021-12-14 12:29:37,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675602060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:37,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:37,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:29:37,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429931834] [2021-12-14 12:29:37,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:37,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:37,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:37,386 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:40,458 INFO L93 Difference]: Finished difference Result 5540 states and 9221 transitions. [2021-12-14 12:29:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-14 12:29:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:40,472 INFO L225 Difference]: With dead ends: 5540 [2021-12-14 12:29:40,472 INFO L226 Difference]: Without dead ends: 3591 [2021-12-14 12:29:40,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:40,481 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 923 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:40,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-14 12:29:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-12-14 12:29:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3581. [2021-12-14 12:29:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-14 12:29:40,547 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 87 [2021-12-14 12:29:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:40,549 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-14 12:29:40,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-14 12:29:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 12:29:40,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:40,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:40,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:29:40,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 152230728, now seen corresponding path program 1 times [2021-12-14 12:29:40,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:40,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960774220] [2021-12-14 12:29:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:40,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:29:40,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:40,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960774220] [2021-12-14 12:29:40,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960774220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:40,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:40,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:29:40,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757534795] [2021-12-14 12:29:40,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:40,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:40,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:40,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:40,690 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:43,695 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-14 12:29:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:43,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-12-14 12:29:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:43,717 INFO L225 Difference]: With dead ends: 10352 [2021-12-14 12:29:43,717 INFO L226 Difference]: Without dead ends: 6773 [2021-12-14 12:29:43,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:43,724 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:43,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-14 12:29:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-14 12:29:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-14 12:29:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions. [2021-12-14 12:29:43,820 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 101 [2021-12-14 12:29:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:43,821 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions. [2021-12-14 12:29:43,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions. [2021-12-14 12:29:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 12:29:43,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:43,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:43,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:29:43,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1958755326, now seen corresponding path program 1 times [2021-12-14 12:29:43,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:43,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975321291] [2021-12-14 12:29:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:43,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:29:43,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:43,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975321291] [2021-12-14 12:29:43,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975321291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:43,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:43,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:29:43,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002742728] [2021-12-14 12:29:43,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:43,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:43,942 INFO L87 Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:46,779 INFO L93 Difference]: Finished difference Result 19804 states and 26220 transitions. [2021-12-14 12:29:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-14 12:29:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:46,820 INFO L225 Difference]: With dead ends: 19804 [2021-12-14 12:29:46,820 INFO L226 Difference]: Without dead ends: 13057 [2021-12-14 12:29:46,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:46,834 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:46,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 12:29:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-12-14 12:29:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2021-12-14 12:29:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.217914336066202) internal successors, (15895), 13051 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15895 transitions. [2021-12-14 12:29:47,016 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15895 transitions. Word has length 130 [2021-12-14 12:29:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:47,017 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 15895 transitions. [2021-12-14 12:29:47,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15895 transitions. [2021-12-14 12:29:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-14 12:29:47,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:47,022 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:47,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:29:47,022 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:47,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1184373553, now seen corresponding path program 1 times [2021-12-14 12:29:47,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:47,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74932359] [2021-12-14 12:29:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:47,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 12:29:47,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:47,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74932359] [2021-12-14 12:29:47,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74932359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:47,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:47,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:29:47,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508290873] [2021-12-14 12:29:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:47,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:47,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:47,149 INFO L87 Difference]: Start difference. First operand 13052 states and 15895 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:49,618 INFO L93 Difference]: Finished difference Result 26889 states and 32590 transitions. [2021-12-14 12:29:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:49,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 208 [2021-12-14 12:29:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:49,642 INFO L225 Difference]: With dead ends: 26889 [2021-12-14 12:29:49,642 INFO L226 Difference]: Without dead ends: 13839 [2021-12-14 12:29:49,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:49,654 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:49,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 12:29:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-12-14 12:29:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 13839. [2021-12-14 12:29:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 1.2058823529411764) internal successors, (16687), 13838 states have internal predecessors, (16687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 16687 transitions. [2021-12-14 12:29:49,807 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 16687 transitions. Word has length 208 [2021-12-14 12:29:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:49,808 INFO L470 AbstractCegarLoop]: Abstraction has 13839 states and 16687 transitions. [2021-12-14 12:29:49,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 16687 transitions. [2021-12-14 12:29:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-14 12:29:49,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:49,813 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:49,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 12:29:49,813 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:49,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash 25568218, now seen corresponding path program 1 times [2021-12-14 12:29:49,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:49,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922280848] [2021-12-14 12:29:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:49,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:29:49,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:49,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922280848] [2021-12-14 12:29:49,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922280848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:49,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:49,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:29:49,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501091512] [2021-12-14 12:29:49,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:49,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:49,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:49,907 INFO L87 Difference]: Start difference. First operand 13839 states and 16687 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:52,855 INFO L93 Difference]: Finished difference Result 33200 states and 41058 transitions. [2021-12-14 12:29:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2021-12-14 12:29:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:52,885 INFO L225 Difference]: With dead ends: 33200 [2021-12-14 12:29:52,885 INFO L226 Difference]: Without dead ends: 20150 [2021-12-14 12:29:52,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:52,900 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 862 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:52,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 942 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 12:29:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20150 states. [2021-12-14 12:29:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20150 to 20140. [2021-12-14 12:29:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20140 states, 20139 states have (on average 1.1900789512885446) internal successors, (23967), 20139 states have internal predecessors, (23967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20140 states to 20140 states and 23967 transitions. [2021-12-14 12:29:53,147 INFO L78 Accepts]: Start accepts. Automaton has 20140 states and 23967 transitions. Word has length 215 [2021-12-14 12:29:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:53,147 INFO L470 AbstractCegarLoop]: Abstraction has 20140 states and 23967 transitions. [2021-12-14 12:29:53,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 20140 states and 23967 transitions. [2021-12-14 12:29:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-14 12:29:53,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:53,150 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:29:53,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:29:53,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1322212109, now seen corresponding path program 1 times [2021-12-14 12:29:53,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:53,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967741946] [2021-12-14 12:29:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:53,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:29:53,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:53,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967741946] [2021-12-14 12:29:53,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967741946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:53,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:53,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:29:53,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719909042] [2021-12-14 12:29:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:53,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:29:53,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:29:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:53,227 INFO L87 Difference]: Start difference. First operand 20140 states and 23967 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:29:55,558 INFO L93 Difference]: Finished difference Result 39361 states and 46961 transitions. [2021-12-14 12:29:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:29:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 230 [2021-12-14 12:29:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:29:55,603 INFO L225 Difference]: With dead ends: 39361 [2021-12-14 12:29:55,604 INFO L226 Difference]: Without dead ends: 20010 [2021-12-14 12:29:55,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:29:55,621 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 1037 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:29:55,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1642 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-14 12:29:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2021-12-14 12:29:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19219. [2021-12-14 12:29:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19219 states, 19218 states have (on average 1.1323238630450618) internal successors, (21761), 19218 states have internal predecessors, (21761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19219 states to 19219 states and 21761 transitions. [2021-12-14 12:29:55,783 INFO L78 Accepts]: Start accepts. Automaton has 19219 states and 21761 transitions. Word has length 230 [2021-12-14 12:29:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:29:55,783 INFO L470 AbstractCegarLoop]: Abstraction has 19219 states and 21761 transitions. [2021-12-14 12:29:55,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:29:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 19219 states and 21761 transitions. [2021-12-14 12:29:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-14 12:29:55,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:29:55,787 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-14 12:29:55,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 12:29:55,788 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:29:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:29:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1023656445, now seen corresponding path program 1 times [2021-12-14 12:29:55,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:29:55,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883188383] [2021-12-14 12:29:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:29:55,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:29:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:29:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 12:29:55,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:29:55,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883188383] [2021-12-14 12:29:55,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883188383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:29:55,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:29:55,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:29:55,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401598925] [2021-12-14 12:29:55,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:29:55,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:29:55,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:29:55,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:29:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:29:55,988 INFO L87 Difference]: Start difference. First operand 19219 states and 21761 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:02,005 INFO L93 Difference]: Finished difference Result 70903 states and 80409 transitions. [2021-12-14 12:30:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:30:02,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 299 [2021-12-14 12:30:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:02,072 INFO L225 Difference]: With dead ends: 70903 [2021-12-14 12:30:02,072 INFO L226 Difference]: Without dead ends: 52473 [2021-12-14 12:30:02,098 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 [2021-12-14 12:30:02,099 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1706 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 6640 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 7677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 6640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:02,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 810 Invalid, 7677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 6640 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-14 12:30:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52473 states. [2021-12-14 12:30:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52473 to 50782. [2021-12-14 12:30:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50782 states, 50781 states have (on average 1.116401803824265) internal successors, (56692), 50781 states have internal predecessors, (56692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50782 states to 50782 states and 56692 transitions. [2021-12-14 12:30:02,892 INFO L78 Accepts]: Start accepts. Automaton has 50782 states and 56692 transitions. Word has length 299 [2021-12-14 12:30:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:02,892 INFO L470 AbstractCegarLoop]: Abstraction has 50782 states and 56692 transitions. [2021-12-14 12:30:02,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 50782 states and 56692 transitions. [2021-12-14 12:30:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-14 12:30:02,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:30:02,896 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:30:02,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:30:02,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:30:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:30:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1837894397, now seen corresponding path program 1 times [2021-12-14 12:30:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:30:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522902892] [2021-12-14 12:30:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:02,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:30:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-14 12:30:03,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:30:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522902892] [2021-12-14 12:30:03,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522902892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:30:03,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:30:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:30:03,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462834748] [2021-12-14 12:30:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:30:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:30:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:30:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:30:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:03,024 INFO L87 Difference]: Start difference. First operand 50782 states and 56692 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:06,431 INFO L93 Difference]: Finished difference Result 111025 states and 123695 transitions. [2021-12-14 12:30:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:30:06,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 313 [2021-12-14 12:30:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:06,511 INFO L225 Difference]: With dead ends: 111025 [2021-12-14 12:30:06,511 INFO L226 Difference]: Without dead ends: 60245 [2021-12-14 12:30:06,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:06,531 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 726 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:06,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1177 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-14 12:30:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60245 states. [2021-12-14 12:30:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60245 to 59450. [2021-12-14 12:30:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59450 states, 59449 states have (on average 1.1065282847482716) internal successors, (65782), 59449 states have internal predecessors, (65782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59450 states to 59450 states and 65782 transitions. [2021-12-14 12:30:07,158 INFO L78 Accepts]: Start accepts. Automaton has 59450 states and 65782 transitions. Word has length 313 [2021-12-14 12:30:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:07,159 INFO L470 AbstractCegarLoop]: Abstraction has 59450 states and 65782 transitions. [2021-12-14 12:30:07,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 59450 states and 65782 transitions. [2021-12-14 12:30:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-14 12:30:07,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:30:07,164 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:30:07,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 12:30:07,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:30:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:30:07,165 INFO L85 PathProgramCache]: Analyzing trace with hash -820854567, now seen corresponding path program 1 times [2021-12-14 12:30:07,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:30:07,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73846789] [2021-12-14 12:30:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:07,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:30:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 196 proven. 113 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 12:30:07,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:30:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73846789] [2021-12-14 12:30:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73846789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:30:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436775417] [2021-12-14 12:30:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:07,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:30:07,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:30:07,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:30:07,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 12:30:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:07,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:30:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:30:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-14 12:30:08,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:30:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436775417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:30:08,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:30:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-14 12:30:08,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129156597] [2021-12-14 12:30:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:30:08,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:30:08,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:30:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:30:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-14 12:30:08,193 INFO L87 Difference]: Start difference. First operand 59450 states and 65782 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:10,982 INFO L93 Difference]: Finished difference Result 118109 states and 130769 transitions. [2021-12-14 12:30:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:30:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 342 [2021-12-14 12:30:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:11,057 INFO L225 Difference]: With dead ends: 118109 [2021-12-14 12:30:11,059 INFO L226 Difference]: Without dead ends: 59448 [2021-12-14 12:30:11,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-14 12:30:11,110 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1113 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:11,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1424 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 12:30:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59448 states. [2021-12-14 12:30:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59448 to 59447. [2021-12-14 12:30:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59447 states, 59446 states have (on average 1.0850015139790734) internal successors, (64499), 59446 states have internal predecessors, (64499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59447 states to 59447 states and 64499 transitions. [2021-12-14 12:30:11,848 INFO L78 Accepts]: Start accepts. Automaton has 59447 states and 64499 transitions. Word has length 342 [2021-12-14 12:30:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:11,849 INFO L470 AbstractCegarLoop]: Abstraction has 59447 states and 64499 transitions. [2021-12-14 12:30:11,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 59447 states and 64499 transitions. [2021-12-14 12:30:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-12-14 12:30:11,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:30:11,852 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 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] [2021-12-14 12:30:11,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 12:30:12,066 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,SelfDestructingSolverStorable9 [2021-12-14 12:30:12,066 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:30:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:30:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1208469246, now seen corresponding path program 1 times [2021-12-14 12:30:12,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:30:12,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889015325] [2021-12-14 12:30:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:12,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:30:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-14 12:30:12,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:30:12,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889015325] [2021-12-14 12:30:12,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889015325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:30:12,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:30:12,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:30:12,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288855279] [2021-12-14 12:30:12,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:30:12,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:30:12,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:30:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:30:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:12,192 INFO L87 Difference]: Start difference. First operand 59447 states and 64499 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:15,318 INFO L93 Difference]: Finished difference Result 133075 states and 145734 transitions. [2021-12-14 12:30:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:30:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 345 [2021-12-14 12:30:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:15,424 INFO L225 Difference]: With dead ends: 133075 [2021-12-14 12:30:15,425 INFO L226 Difference]: Without dead ends: 83085 [2021-12-14 12:30:15,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:15,457 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 951 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:15,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 795 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2957 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 12:30:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83085 states. [2021-12-14 12:30:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83085 to 83076. [2021-12-14 12:30:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83076 states, 83075 states have (on average 1.087896479085164) internal successors, (90377), 83075 states have internal predecessors, (90377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83076 states to 83076 states and 90377 transitions. [2021-12-14 12:30:16,468 INFO L78 Accepts]: Start accepts. Automaton has 83076 states and 90377 transitions. Word has length 345 [2021-12-14 12:30:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:16,468 INFO L470 AbstractCegarLoop]: Abstraction has 83076 states and 90377 transitions. [2021-12-14 12:30:16,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 83076 states and 90377 transitions. [2021-12-14 12:30:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-14 12:30:16,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:30:16,490 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-14 12:30:16,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 12:30:16,490 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:30:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:30:16,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1519622775, now seen corresponding path program 1 times [2021-12-14 12:30:16,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:30:16,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470041826] [2021-12-14 12:30:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:16,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:30:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-14 12:30:16,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:30:16,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470041826] [2021-12-14 12:30:16,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470041826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:30:16,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:30:16,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:30:16,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13546012] [2021-12-14 12:30:16,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:30:16,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:30:16,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:30:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:30:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:16,701 INFO L87 Difference]: Start difference. First operand 83076 states and 90377 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:20,387 INFO L93 Difference]: Finished difference Result 192128 states and 210608 transitions. [2021-12-14 12:30:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:30:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 372 [2021-12-14 12:30:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:20,525 INFO L225 Difference]: With dead ends: 192128 [2021-12-14 12:30:20,525 INFO L226 Difference]: Without dead ends: 109841 [2021-12-14 12:30:20,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:20,553 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 884 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 3349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:20,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 904 Invalid, 3349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-14 12:30:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109841 states. [2021-12-14 12:30:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109841 to 107461. [2021-12-14 12:30:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107461 states, 107460 states have (on average 1.091531732737763) internal successors, (117296), 107460 states have internal predecessors, (117296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107461 states to 107461 states and 117296 transitions. [2021-12-14 12:30:21,753 INFO L78 Accepts]: Start accepts. Automaton has 107461 states and 117296 transitions. Word has length 372 [2021-12-14 12:30:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:21,755 INFO L470 AbstractCegarLoop]: Abstraction has 107461 states and 117296 transitions. [2021-12-14 12:30:21,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 107461 states and 117296 transitions. [2021-12-14 12:30:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-14 12:30:21,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:30:21,772 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:30:21,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 12:30:21,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:30:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:30:21,773 INFO L85 PathProgramCache]: Analyzing trace with hash -201282790, now seen corresponding path program 1 times [2021-12-14 12:30:21,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:30:21,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488861494] [2021-12-14 12:30:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:21,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:30:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-12-14 12:30:22,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:30:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488861494] [2021-12-14 12:30:22,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488861494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:30:22,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:30:22,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:30:22,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669130986] [2021-12-14 12:30:22,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:30:22,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:30:22,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:30:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:30:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:22,153 INFO L87 Difference]: Start difference. First operand 107461 states and 117296 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:25,531 INFO L93 Difference]: Finished difference Result 216498 states and 236184 transitions. [2021-12-14 12:30:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:30:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 405 [2021-12-14 12:30:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:25,661 INFO L225 Difference]: With dead ends: 216498 [2021-12-14 12:30:25,662 INFO L226 Difference]: Without dead ends: 109826 [2021-12-14 12:30:25,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:25,876 INFO L933 BasicCegarLoop]: 1386 mSDtfsCounter, 1023 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:25,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 1472 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 12:30:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109826 states. [2021-12-14 12:30:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109826 to 107454. [2021-12-14 12:30:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107454 states, 107453 states have (on average 1.0681507263640848) internal successors, (114776), 107453 states have internal predecessors, (114776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107454 states to 107454 states and 114776 transitions. [2021-12-14 12:30:27,327 INFO L78 Accepts]: Start accepts. Automaton has 107454 states and 114776 transitions. Word has length 405 [2021-12-14 12:30:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:27,328 INFO L470 AbstractCegarLoop]: Abstraction has 107454 states and 114776 transitions. [2021-12-14 12:30:27,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 107454 states and 114776 transitions. [2021-12-14 12:30:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-12-14 12:30:27,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:30:27,337 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:30:27,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 12:30:27,338 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:30:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:30:27,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1634580838, now seen corresponding path program 1 times [2021-12-14 12:30:27,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:30:27,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623723737] [2021-12-14 12:30:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:30:27,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:30:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:30:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 538 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 12:30:27,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:30:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623723737] [2021-12-14 12:30:27,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623723737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:30:27,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:30:27,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:30:27,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895019751] [2021-12-14 12:30:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:30:27,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:30:27,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:30:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:30:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:27,440 INFO L87 Difference]: Start difference. First operand 107454 states and 114776 transitions. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:30:31,409 INFO L93 Difference]: Finished difference Result 277223 states and 296834 transitions. [2021-12-14 12:30:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:30:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 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 485 [2021-12-14 12:30:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:30:31,818 INFO L225 Difference]: With dead ends: 277223 [2021-12-14 12:30:31,819 INFO L226 Difference]: Without dead ends: 170558 [2021-12-14 12:30:31,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:30:31,871 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 845 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:30:31,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 755 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-14 12:30:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170558 states. [2021-12-14 12:30:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170558 to 166515. [2021-12-14 12:30:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166515 states, 166514 states have (on average 1.0666550560313246) internal successors, (177613), 166514 states have internal predecessors, (177613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166515 states to 166515 states and 177613 transitions. [2021-12-14 12:30:33,756 INFO L78 Accepts]: Start accepts. Automaton has 166515 states and 177613 transitions. Word has length 485 [2021-12-14 12:30:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:30:33,757 INFO L470 AbstractCegarLoop]: Abstraction has 166515 states and 177613 transitions. [2021-12-14 12:30:33,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:30:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 166515 states and 177613 transitions.