./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label48.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/Problem17_label48.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 0d929df4a838f03b0a70e3f4a24ac63ec6782a4f298757e5a2174a7cc8e9071c --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:47:40,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:47:40,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:47:40,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:47:40,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:47:40,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:47:40,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:47:40,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:47:40,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:47:40,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:47:40,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:47:40,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:47:40,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:47:40,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:47:40,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:47:40,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:47:40,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:47:40,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:47:40,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:47:40,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:47:40,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:47:40,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:47:40,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:47:40,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:47:40,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:47:40,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:47:40,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:47:40,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:47:40,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:47:40,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:47:40,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:47:40,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:47:40,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:47:40,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:47:40,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:47:40,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:47:40,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:47:40,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:47:40,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:47:40,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:47:40,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:47:40,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:47:40,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:47:40,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:47:40,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:47:40,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:47:40,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:47:40,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:47:40,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:47:40,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:47:40,314 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:47:40,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:47:40,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:47:40,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:47:40,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:47:40,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:47:40,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:47:40,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:47:40,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:47:40,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:47:40,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:47:40,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:47:40,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:47:40,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:47:40,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:47:40,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:47:40,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:47:40,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:47:40,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:47:40,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:47:40,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:47:40,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:47:40,318 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:47:40,319 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:47:40,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:47:40,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:47:40,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d929df4a838f03b0a70e3f4a24ac63ec6782a4f298757e5a2174a7cc8e9071c [2021-12-14 12:47:40,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:47:40,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:47:40,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:47:40,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:47:40,511 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:47:40,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label48.c [2021-12-14 12:47:40,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef33e348d/54e1f6476ebc4841bd907c5169ab5f76/FLAGf3194d83e [2021-12-14 12:47:41,058 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:47:41,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label48.c [2021-12-14 12:47:41,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef33e348d/54e1f6476ebc4841bd907c5169ab5f76/FLAGf3194d83e [2021-12-14 12:47:41,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef33e348d/54e1f6476ebc4841bd907c5169ab5f76 [2021-12-14 12:47:41,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:47:41,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:47:41,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:47:41,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:47:41,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:47:41,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:47:41" (1/1) ... [2021-12-14 12:47:41,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1525b059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:41, skipping insertion in model container [2021-12-14 12:47:41,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:47:41" (1/1) ... [2021-12-14 12:47:41,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:47:41,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:47:41,808 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/Problem17_label48.c[6493,6506] [2021-12-14 12:47:42,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:47:42,173 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:47:42,195 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/Problem17_label48.c[6493,6506] [2021-12-14 12:47:42,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:47:42,384 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:47:42,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42 WrapperNode [2021-12-14 12:47:42,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:47:42,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:47:42,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:47:42,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:47:42,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,632 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-14 12:47:42,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:47:42,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:47:42,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:47:42,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:47:42,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:47:42,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:47:42,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:47:42,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:47:42,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (1/1) ... [2021-12-14 12:47:42,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:47:42,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:47:42,992 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 12:47:43,012 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 12:47:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:47:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:47:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:47:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:47:43,074 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:47:43,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:47:45,131 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:47:45,144 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:47:45,145 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 12:47:45,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:47:45 BoogieIcfgContainer [2021-12-14 12:47:45,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:47:45,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:47:45,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:47:45,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:47:45,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:47:41" (1/3) ... [2021-12-14 12:47:45,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a715c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:47:45, skipping insertion in model container [2021-12-14 12:47:45,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:42" (2/3) ... [2021-12-14 12:47:45,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a715c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:47:45, skipping insertion in model container [2021-12-14 12:47:45,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:47:45" (3/3) ... [2021-12-14 12:47:45,153 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label48.c [2021-12-14 12:47:45,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:47:45,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:47:45,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:47:45,193 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 12:47:45,194 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:47:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 12:47:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 12:47:45,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:45,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:47:45,217 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-14 12:47:45,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:45,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919477968] [2021-12-14 12:47:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:45,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:45,433 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 12:47:45,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:45,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919477968] [2021-12-14 12:47:45,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919477968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:45,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:45,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:47:45,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42136009] [2021-12-14 12:47:45,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:45,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:47:45,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:47:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:47:45,464 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:47:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:47:47,685 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-14 12:47:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:47:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-14 12:47:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:47:47,705 INFO L225 Difference]: With dead ends: 1644 [2021-12-14 12:47:47,706 INFO L226 Difference]: Without dead ends: 977 [2021-12-14 12:47:47,714 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 12:47:47,717 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 445 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:47:47,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 12:47:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-14 12:47:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-14 12:47:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states 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 12:47:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-14 12:47:47,787 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 43 [2021-12-14 12:47:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:47:47,788 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-14 12:47:47,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:47:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-14 12:47:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 12:47:47,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:47,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:47:47,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:47:47,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1850762806, now seen corresponding path program 1 times [2021-12-14 12:47:47,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777513560] [2021-12-14 12:47:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:47,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:47:47,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777513560] [2021-12-14 12:47:47,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777513560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:47,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:47,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:47:47,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660264973] [2021-12-14 12:47:47,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:47,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:47:47,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:47:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:47:47,855 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:47:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:47:49,791 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2021-12-14 12:47:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:47:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-14 12:47:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:47:49,798 INFO L225 Difference]: With dead ends: 2815 [2021-12-14 12:47:49,798 INFO L226 Difference]: Without dead ends: 1846 [2021-12-14 12:47:49,799 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 12:47:49,800 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 12:47:49,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 12:47:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-14 12:47:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2021-12-14 12:47:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states 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 12:47:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2021-12-14 12:47:49,832 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 110 [2021-12-14 12:47:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:47:49,834 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2021-12-14 12:47:49,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:47:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2021-12-14 12:47:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 12:47:49,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:49,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:47:49,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:47:49,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -995864428, now seen corresponding path program 1 times [2021-12-14 12:47:49,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588670030] [2021-12-14 12:47:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:49,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:47:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588670030] [2021-12-14 12:47:49,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588670030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:49,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:49,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:47:49,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82257552] [2021-12-14 12:47:49,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:49,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:47:49,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:47:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:47:49,926 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 12:47:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:47:53,085 INFO L93 Difference]: Finished difference Result 6767 states and 9263 transitions. [2021-12-14 12:47:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:47:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-14 12:47:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:47:53,102 INFO L225 Difference]: With dead ends: 6767 [2021-12-14 12:47:53,103 INFO L226 Difference]: Without dead ends: 4928 [2021-12-14 12:47:53,105 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 12:47:53,111 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 872 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:47:53,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 328 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-14 12:47:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-12-14 12:47:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4875. [2021-12-14 12:47:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.2870332375871973) internal successors, (6273), 4874 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states 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 12:47:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6273 transitions. [2021-12-14 12:47:53,180 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6273 transitions. Word has length 113 [2021-12-14 12:47:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:47:53,182 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 6273 transitions. [2021-12-14 12:47:53,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 12:47:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6273 transitions. [2021-12-14 12:47:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 12:47:53,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:53,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:47:53,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:47:53,185 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:53,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2113802819, now seen corresponding path program 1 times [2021-12-14 12:47:53,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:53,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538279617] [2021-12-14 12:47:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:53,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-14 12:47:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538279617] [2021-12-14 12:47:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538279617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:53,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:53,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:47:53,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875192686] [2021-12-14 12:47:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:53,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:47:53,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:53,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:47:53,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:47:53,315 INFO L87 Difference]: Start difference. First operand 4875 states and 6273 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 12:47:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:47:54,960 INFO L93 Difference]: Finished difference Result 14436 states and 18550 transitions. [2021-12-14 12:47:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:47:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 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 179 [2021-12-14 12:47:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:47:54,983 INFO L225 Difference]: With dead ends: 14436 [2021-12-14 12:47:54,983 INFO L226 Difference]: Without dead ends: 8277 [2021-12-14 12:47:54,990 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 12:47:54,991 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:47:54,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 12:47:54,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-12-14 12:47:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6571. [2021-12-14 12:47:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6571 states, 6570 states have (on average 1.1796042617960427) internal successors, (7750), 6570 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states 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 12:47:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6571 states to 6571 states and 7750 transitions. [2021-12-14 12:47:55,113 INFO L78 Accepts]: Start accepts. Automaton has 6571 states and 7750 transitions. Word has length 179 [2021-12-14 12:47:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:47:55,114 INFO L470 AbstractCegarLoop]: Abstraction has 6571 states and 7750 transitions. [2021-12-14 12:47:55,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 12:47:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6571 states and 7750 transitions. [2021-12-14 12:47:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-14 12:47:55,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:55,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 12:47:55,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:47:55,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash 280509979, now seen corresponding path program 1 times [2021-12-14 12:47:55,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:55,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987859368] [2021-12-14 12:47:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:55,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:47:55,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:55,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987859368] [2021-12-14 12:47:55,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987859368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:55,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:55,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:47:55,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51145416] [2021-12-14 12:47:55,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:55,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:47:55,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:47:55,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:47:55,222 INFO L87 Difference]: Start difference. First operand 6571 states and 7750 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 12:47:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:47:56,762 INFO L93 Difference]: Finished difference Result 16550 states and 19925 transitions. [2021-12-14 12:47:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:47:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2021-12-14 12:47:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:47:56,807 INFO L225 Difference]: With dead ends: 16550 [2021-12-14 12:47:56,807 INFO L226 Difference]: Without dead ends: 9981 [2021-12-14 12:47:56,812 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 12:47:56,814 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 499 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:47:56,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 801 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:47:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-12-14 12:47:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9981. [2021-12-14 12:47:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9981 states, 9980 states have (on average 1.1698396793587174) internal successors, (11675), 9980 states have internal predecessors, (11675), 0 states have call successors, (0), 0 states 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 12:47:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9981 states to 9981 states and 11675 transitions. [2021-12-14 12:47:56,945 INFO L78 Accepts]: Start accepts. Automaton has 9981 states and 11675 transitions. Word has length 192 [2021-12-14 12:47:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:47:56,946 INFO L470 AbstractCegarLoop]: Abstraction has 9981 states and 11675 transitions. [2021-12-14 12:47:56,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 12:47:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 9981 states and 11675 transitions. [2021-12-14 12:47:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-14 12:47:56,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:56,950 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:47:56,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 12:47:56,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 193566755, now seen corresponding path program 1 times [2021-12-14 12:47:56,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646709701] [2021-12-14 12:47:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:56,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 12:47:57,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:57,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646709701] [2021-12-14 12:47:57,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646709701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:57,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:57,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:47:57,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118872522] [2021-12-14 12:47:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:57,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:47:57,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:47:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:47:57,037 INFO L87 Difference]: Start difference. First operand 9981 states and 11675 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 12:47:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:47:59,098 INFO L93 Difference]: Finished difference Result 24248 states and 28757 transitions. [2021-12-14 12:47:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:47:59,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 197 [2021-12-14 12:47:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:47:59,124 INFO L225 Difference]: With dead ends: 24248 [2021-12-14 12:47:59,125 INFO L226 Difference]: Without dead ends: 14269 [2021-12-14 12:47:59,135 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 12:47:59,135 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 477 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:47:59,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 444 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 12:47:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14269 states. [2021-12-14 12:47:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14269 to 13397. [2021-12-14 12:47:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13397 states, 13396 states have (on average 1.1923708569722304) internal successors, (15973), 13396 states have internal predecessors, (15973), 0 states have call successors, (0), 0 states 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 12:47:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13397 states to 13397 states and 15973 transitions. [2021-12-14 12:47:59,364 INFO L78 Accepts]: Start accepts. Automaton has 13397 states and 15973 transitions. Word has length 197 [2021-12-14 12:47:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:47:59,365 INFO L470 AbstractCegarLoop]: Abstraction has 13397 states and 15973 transitions. [2021-12-14 12:47:59,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 12:47:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 13397 states and 15973 transitions. [2021-12-14 12:47:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-14 12:47:59,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:47:59,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:47:59,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:47:59,368 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:47:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:47:59,369 INFO L85 PathProgramCache]: Analyzing trace with hash -256455219, now seen corresponding path program 1 times [2021-12-14 12:47:59,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:47:59,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120176333] [2021-12-14 12:47:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:47:59,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:47:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:47:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 12:47:59,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:47:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120176333] [2021-12-14 12:47:59,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120176333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:47:59,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:47:59,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:47:59,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805661760] [2021-12-14 12:47:59,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:47:59,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:47:59,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:47:59,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:47:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:47:59,450 INFO L87 Difference]: Start difference. First operand 13397 states and 15973 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 12:48:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:01,464 INFO L93 Difference]: Finished difference Result 30624 states and 36860 transitions. [2021-12-14 12:48:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 242 [2021-12-14 12:48:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:01,491 INFO L225 Difference]: With dead ends: 30624 [2021-12-14 12:48:01,491 INFO L226 Difference]: Without dead ends: 17229 [2021-12-14 12:48:01,504 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 12:48:01,506 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 460 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:01,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 410 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 12:48:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2021-12-14 12:48:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 13379. [2021-12-14 12:48:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13379 states, 13378 states have (on average 1.190611451637016) internal successors, (15928), 13378 states have internal predecessors, (15928), 0 states have call successors, (0), 0 states 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 12:48:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13379 states to 13379 states and 15928 transitions. [2021-12-14 12:48:01,711 INFO L78 Accepts]: Start accepts. Automaton has 13379 states and 15928 transitions. Word has length 242 [2021-12-14 12:48:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:01,711 INFO L470 AbstractCegarLoop]: Abstraction has 13379 states and 15928 transitions. [2021-12-14 12:48:01,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 12:48:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 13379 states and 15928 transitions. [2021-12-14 12:48:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-14 12:48:01,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:01,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:01,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 12:48:01,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1929609517, now seen corresponding path program 1 times [2021-12-14 12:48:01,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620504605] [2021-12-14 12:48:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:01,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:48:01,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:01,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620504605] [2021-12-14 12:48:01,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620504605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:01,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:01,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:48:01,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280110904] [2021-12-14 12:48:01,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:01,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:01,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:01,808 INFO L87 Difference]: Start difference. First operand 13379 states and 15928 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 12:48:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:03,566 INFO L93 Difference]: Finished difference Result 30622 states and 36711 transitions. [2021-12-14 12:48:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 259 [2021-12-14 12:48:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:03,590 INFO L225 Difference]: With dead ends: 30622 [2021-12-14 12:48:03,590 INFO L226 Difference]: Without dead ends: 17245 [2021-12-14 12:48:03,598 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 12:48:03,598 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 356 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:03,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 887 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 12:48:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17245 states. [2021-12-14 12:48:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17245 to 16812. [2021-12-14 12:48:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16812 states, 16811 states have (on average 1.1727440366426745) internal successors, (19715), 16811 states have internal predecessors, (19715), 0 states have call successors, (0), 0 states 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 12:48:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16812 states to 16812 states and 19715 transitions. [2021-12-14 12:48:03,789 INFO L78 Accepts]: Start accepts. Automaton has 16812 states and 19715 transitions. Word has length 259 [2021-12-14 12:48:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:03,789 INFO L470 AbstractCegarLoop]: Abstraction has 16812 states and 19715 transitions. [2021-12-14 12:48:03,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 12:48:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 16812 states and 19715 transitions. [2021-12-14 12:48:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-14 12:48:03,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:03,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:48:03,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:48:03,794 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1330701290, now seen corresponding path program 1 times [2021-12-14 12:48:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:03,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581404787] [2021-12-14 12:48:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:03,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 220 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 12:48:03,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:03,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581404787] [2021-12-14 12:48:03,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581404787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:48:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298405864] [2021-12-14 12:48:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:03,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:48:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:48:03,880 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 12:48:03,890 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 12:48:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 12:48:03,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:48:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 220 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 12:48:04,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 12:48:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 12:48:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298405864] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 12:48:05,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 12:48:05,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-14 12:48:05,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743891180] [2021-12-14 12:48:05,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:05,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:48:05,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:05,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:48:05,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:48:05,215 INFO L87 Difference]: Start difference. First operand 16812 states and 19715 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 12:48:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:08,391 INFO L93 Difference]: Finished difference Result 47275 states and 56056 transitions. [2021-12-14 12:48:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:48:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 267 [2021-12-14 12:48:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:08,423 INFO L225 Difference]: With dead ends: 47275 [2021-12-14 12:48:08,423 INFO L226 Difference]: Without dead ends: 28306 [2021-12-14 12:48:08,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 529 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:48:08,438 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1064 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 1225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 3491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1225 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:08,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 149 Invalid, 3491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1225 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-14 12:48:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28306 states. [2021-12-14 12:48:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28306 to 27875. [2021-12-14 12:48:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27875 states, 27874 states have (on average 1.1424625098658248) internal successors, (31845), 27874 states have internal predecessors, (31845), 0 states have call successors, (0), 0 states 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 12:48:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27875 states to 27875 states and 31845 transitions. [2021-12-14 12:48:08,922 INFO L78 Accepts]: Start accepts. Automaton has 27875 states and 31845 transitions. Word has length 267 [2021-12-14 12:48:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:08,922 INFO L470 AbstractCegarLoop]: Abstraction has 27875 states and 31845 transitions. [2021-12-14 12:48:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 12:48:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 27875 states and 31845 transitions. [2021-12-14 12:48:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-14 12:48:08,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:08,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 12:48:09,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 12:48:09,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:48:09,138 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:09,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1288715760, now seen corresponding path program 1 times [2021-12-14 12:48:09,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:09,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728524480] [2021-12-14 12:48:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:09,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-14 12:48:09,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728524480] [2021-12-14 12:48:09,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728524480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:09,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:09,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:48:09,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072627961] [2021-12-14 12:48:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:09,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:09,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:09,230 INFO L87 Difference]: Start difference. First operand 27875 states and 31845 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 12:48:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:11,051 INFO L93 Difference]: Finished difference Result 64690 states and 73399 transitions. [2021-12-14 12:48:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 361 [2021-12-14 12:48:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:11,089 INFO L225 Difference]: With dead ends: 64690 [2021-12-14 12:48:11,089 INFO L226 Difference]: Without dead ends: 36817 [2021-12-14 12:48:11,105 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 12:48:11,105 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 485 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:11,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 282 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 12:48:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36817 states. [2021-12-14 12:48:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36817 to 36367. [2021-12-14 12:48:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36367 states, 36366 states have (on average 1.122422042567233) internal successors, (40818), 36366 states have internal predecessors, (40818), 0 states have call successors, (0), 0 states 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 12:48:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36367 states to 36367 states and 40818 transitions. [2021-12-14 12:48:11,603 INFO L78 Accepts]: Start accepts. Automaton has 36367 states and 40818 transitions. Word has length 361 [2021-12-14 12:48:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:11,603 INFO L470 AbstractCegarLoop]: Abstraction has 36367 states and 40818 transitions. [2021-12-14 12:48:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 12:48:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 36367 states and 40818 transitions. [2021-12-14 12:48:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-12-14 12:48:11,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:11,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 12:48:11,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 12:48:11,617 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1181895680, now seen corresponding path program 1 times [2021-12-14 12:48:11,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:11,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413116356] [2021-12-14 12:48:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:11,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-14 12:48:11,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413116356] [2021-12-14 12:48:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413116356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:11,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:11,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:48:11,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700110534] [2021-12-14 12:48:11,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:11,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:11,793 INFO L87 Difference]: Start difference. First operand 36367 states and 40818 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 12:48:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:13,276 INFO L93 Difference]: Finished difference Result 79526 states and 89552 transitions. [2021-12-14 12:48:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 382 [2021-12-14 12:48:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:13,321 INFO L225 Difference]: With dead ends: 79526 [2021-12-14 12:48:13,321 INFO L226 Difference]: Without dead ends: 43161 [2021-12-14 12:48:13,334 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 12:48:13,335 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 272 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:13,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 793 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 12:48:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43161 states. [2021-12-14 12:48:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43161 to 43161. [2021-12-14 12:48:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43161 states, 43160 states have (on average 1.1083178869323447) internal successors, (47835), 43160 states have internal predecessors, (47835), 0 states have call successors, (0), 0 states 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 12:48:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43161 states to 43161 states and 47835 transitions. [2021-12-14 12:48:13,797 INFO L78 Accepts]: Start accepts. Automaton has 43161 states and 47835 transitions. Word has length 382 [2021-12-14 12:48:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:13,798 INFO L470 AbstractCegarLoop]: Abstraction has 43161 states and 47835 transitions. [2021-12-14 12:48:13,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 12:48:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 43161 states and 47835 transitions. [2021-12-14 12:48:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-14 12:48:13,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:13,806 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:48:13,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 12:48:13,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash -728615819, now seen corresponding path program 1 times [2021-12-14 12:48:13,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:13,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607909632] [2021-12-14 12:48:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:13,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 12:48:13,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607909632] [2021-12-14 12:48:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607909632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:13,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:13,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:48:13,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699579249] [2021-12-14 12:48:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:13,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:13,946 INFO L87 Difference]: Start difference. First operand 43161 states and 47835 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 12:48:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:15,749 INFO L93 Difference]: Finished difference Result 98273 states and 108802 transitions. [2021-12-14 12:48:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 12:48:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:15,812 INFO L225 Difference]: With dead ends: 98273 [2021-12-14 12:48:15,812 INFO L226 Difference]: Without dead ends: 55114 [2021-12-14 12:48:15,836 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 12:48:15,837 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 336 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 636 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:48:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55114 states. [2021-12-14 12:48:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55114 to 52106. [2021-12-14 12:48:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52106 states, 52105 states have (on average 1.1077055944726995) internal successors, (57717), 52105 states have internal predecessors, (57717), 0 states have call successors, (0), 0 states 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 12:48:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52106 states to 52106 states and 57717 transitions. [2021-12-14 12:48:16,422 INFO L78 Accepts]: Start accepts. Automaton has 52106 states and 57717 transitions. Word has length 405 [2021-12-14 12:48:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:16,423 INFO L470 AbstractCegarLoop]: Abstraction has 52106 states and 57717 transitions. [2021-12-14 12:48:16,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 12:48:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 52106 states and 57717 transitions. [2021-12-14 12:48:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-14 12:48:16,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:16,433 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 12:48:16,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 12:48:16,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2010516335, now seen corresponding path program 1 times [2021-12-14 12:48:16,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979232893] [2021-12-14 12:48:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:16,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 12:48:16,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:16,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979232893] [2021-12-14 12:48:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979232893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:16,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:16,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 12:48:16,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525437086] [2021-12-14 12:48:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:16,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:48:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:48:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:48:16,708 INFO L87 Difference]: Start difference. First operand 52106 states and 57717 transitions. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 12:48:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:19,645 INFO L93 Difference]: Finished difference Result 130213 states and 143849 transitions. [2021-12-14 12:48:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:48:19,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 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 448 [2021-12-14 12:48:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:19,732 INFO L225 Difference]: With dead ends: 130213 [2021-12-14 12:48:19,732 INFO L226 Difference]: Without dead ends: 77684 [2021-12-14 12:48:19,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:48:19,764 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 772 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:19,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 176 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 12:48:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77684 states. [2021-12-14 12:48:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77684 to 69116. [2021-12-14 12:48:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69116 states, 69115 states have (on average 1.1004991680532445) internal successors, (76061), 69115 states have internal predecessors, (76061), 0 states have call successors, (0), 0 states 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 12:48:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69116 states to 69116 states and 76061 transitions. [2021-12-14 12:48:20,580 INFO L78 Accepts]: Start accepts. Automaton has 69116 states and 76061 transitions. Word has length 448 [2021-12-14 12:48:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:20,580 INFO L470 AbstractCegarLoop]: Abstraction has 69116 states and 76061 transitions. [2021-12-14 12:48:20,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 12:48:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 69116 states and 76061 transitions. [2021-12-14 12:48:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-12-14 12:48:20,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:20,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:48:20,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 12:48:20,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash -647586439, now seen corresponding path program 1 times [2021-12-14 12:48:20,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715513188] [2021-12-14 12:48:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:20,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:48:20,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715513188] [2021-12-14 12:48:20,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715513188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:20,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:20,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 12:48:20,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785434499] [2021-12-14 12:48:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:20,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 12:48:20,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 12:48:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:48:20,716 INFO L87 Difference]: Start difference. First operand 69116 states and 76061 transitions. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 12:48:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:24,268 INFO L93 Difference]: Finished difference Result 160834 states and 177544 transitions. [2021-12-14 12:48:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 12:48:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 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 455 [2021-12-14 12:48:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:24,381 INFO L225 Difference]: With dead ends: 160834 [2021-12-14 12:48:24,382 INFO L226 Difference]: Without dead ends: 91720 [2021-12-14 12:48:24,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:48:24,426 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1076 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 3998 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 4414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:24,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 272 Invalid, 4414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 3998 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-14 12:48:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91720 states. [2021-12-14 12:48:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91720 to 82771. [2021-12-14 12:48:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82771 states, 82770 states have (on average 1.1090250090612541) internal successors, (91794), 82770 states have internal predecessors, (91794), 0 states have call successors, (0), 0 states 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 12:48:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82771 states to 82771 states and 91794 transitions. [2021-12-14 12:48:25,431 INFO L78 Accepts]: Start accepts. Automaton has 82771 states and 91794 transitions. Word has length 455 [2021-12-14 12:48:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:25,431 INFO L470 AbstractCegarLoop]: Abstraction has 82771 states and 91794 transitions. [2021-12-14 12:48:25,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 12:48:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 82771 states and 91794 transitions. [2021-12-14 12:48:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-14 12:48:25,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:25,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:25,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 12:48:25,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1334333508, now seen corresponding path program 1 times [2021-12-14 12:48:25,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:25,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857803466] [2021-12-14 12:48:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:25,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-12-14 12:48:25,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:25,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857803466] [2021-12-14 12:48:25,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857803466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:25,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:25,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:48:25,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299950892] [2021-12-14 12:48:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:25,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:25,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:25,699 INFO L87 Difference]: Start difference. First operand 82771 states and 91794 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 12:48:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:26,844 INFO L93 Difference]: Finished difference Result 163403 states and 181048 transitions. [2021-12-14 12:48:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:26,845 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 469 [2021-12-14 12:48:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:26,939 INFO L225 Difference]: With dead ends: 163403 [2021-12-14 12:48:26,940 INFO L226 Difference]: Without dead ends: 80634 [2021-12-14 12:48:26,993 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 12:48:26,994 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 624 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:26,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 103 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:48:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80634 states. [2021-12-14 12:48:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80634 to 78500. [2021-12-14 12:48:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78500 states, 78499 states have (on average 1.1080141148294882) internal successors, (86978), 78499 states have internal predecessors, (86978), 0 states have call successors, (0), 0 states 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 12:48:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78500 states to 78500 states and 86978 transitions. [2021-12-14 12:48:27,978 INFO L78 Accepts]: Start accepts. Automaton has 78500 states and 86978 transitions. Word has length 469 [2021-12-14 12:48:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:27,995 INFO L470 AbstractCegarLoop]: Abstraction has 78500 states and 86978 transitions. [2021-12-14 12:48:27,996 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 12:48:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 78500 states and 86978 transitions. [2021-12-14 12:48:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-12-14 12:48:28,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:28,006 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:28,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 12:48:28,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1193487407, now seen corresponding path program 1 times [2021-12-14 12:48:28,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:28,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443311771] [2021-12-14 12:48:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:28,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-14 12:48:28,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443311771] [2021-12-14 12:48:28,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443311771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:28,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:28,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 12:48:28,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156614371] [2021-12-14 12:48:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:28,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:48:28,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:48:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:48:28,159 INFO L87 Difference]: Start difference. First operand 78500 states and 86978 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:48:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:31,377 INFO L93 Difference]: Finished difference Result 183441 states and 202667 transitions. [2021-12-14 12:48:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:48:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 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 487 [2021-12-14 12:48:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:31,497 INFO L225 Difference]: With dead ends: 183441 [2021-12-14 12:48:31,498 INFO L226 Difference]: Without dead ends: 100685 [2021-12-14 12:48:31,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:48:31,550 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 745 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:31,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 234 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 12:48:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100685 states. [2021-12-14 12:48:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100685 to 96376. [2021-12-14 12:48:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96376 states, 96375 states have (on average 1.103118028534371) internal successors, (106313), 96375 states have internal predecessors, (106313), 0 states have call successors, (0), 0 states 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 12:48:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96376 states to 96376 states and 106313 transitions. [2021-12-14 12:48:32,817 INFO L78 Accepts]: Start accepts. Automaton has 96376 states and 106313 transitions. Word has length 487 [2021-12-14 12:48:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:32,817 INFO L470 AbstractCegarLoop]: Abstraction has 96376 states and 106313 transitions. [2021-12-14 12:48:32,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:48:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 96376 states and 106313 transitions. [2021-12-14 12:48:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-12-14 12:48:32,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:32,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:48:32,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 12:48:32,829 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash -962330125, now seen corresponding path program 1 times [2021-12-14 12:48:32,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129715069] [2021-12-14 12:48:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:32,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-14 12:48:32,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:32,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129715069] [2021-12-14 12:48:32,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129715069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:32,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:32,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:48:32,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905456123] [2021-12-14 12:48:32,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:32,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:32,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:32,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:32,952 INFO L87 Difference]: Start difference. First operand 96376 states and 106313 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 12:48:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:35,051 INFO L93 Difference]: Finished difference Result 214073 states and 236264 transitions. [2021-12-14 12:48:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 498 [2021-12-14 12:48:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:35,203 INFO L225 Difference]: With dead ends: 214073 [2021-12-14 12:48:35,203 INFO L226 Difference]: Without dead ends: 117274 [2021-12-14 12:48:35,261 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 12:48:35,261 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 441 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:35,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 714 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:48:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117274 states. [2021-12-14 12:48:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117274 to 114694. [2021-12-14 12:48:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114694 states, 114693 states have (on average 1.1017760456174308) internal successors, (126366), 114693 states have internal predecessors, (126366), 0 states have call successors, (0), 0 states 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 12:48:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114694 states to 114694 states and 126366 transitions. [2021-12-14 12:48:36,687 INFO L78 Accepts]: Start accepts. Automaton has 114694 states and 126366 transitions. Word has length 498 [2021-12-14 12:48:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:36,688 INFO L470 AbstractCegarLoop]: Abstraction has 114694 states and 126366 transitions. [2021-12-14 12:48:36,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 12:48:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 114694 states and 126366 transitions. [2021-12-14 12:48:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-12-14 12:48:36,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:36,703 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:36,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 12:48:36,703 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash -238159187, now seen corresponding path program 1 times [2021-12-14 12:48:36,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:36,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141886297] [2021-12-14 12:48:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:36,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-12-14 12:48:37,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141886297] [2021-12-14 12:48:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141886297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:37,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:37,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:48:37,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528058018] [2021-12-14 12:48:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:48:37,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:48:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:48:37,056 INFO L87 Difference]: Start difference. First operand 114694 states and 126366 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 12:48:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:48:39,225 INFO L93 Difference]: Finished difference Result 243412 states and 268007 transitions. [2021-12-14 12:48:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:48:39,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 535 [2021-12-14 12:48:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:48:39,382 INFO L225 Difference]: With dead ends: 243412 [2021-12-14 12:48:39,382 INFO L226 Difference]: Without dead ends: 128720 [2021-12-14 12:48:39,417 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 12:48:39,418 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 399 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:48:39,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 323 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 12:48:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128720 states. [2021-12-14 12:48:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128720 to 124883. [2021-12-14 12:48:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124883 states, 124882 states have (on average 1.09584247529668) internal successors, (136851), 124882 states have internal predecessors, (136851), 0 states have call successors, (0), 0 states 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 12:48:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124883 states to 124883 states and 136851 transitions. [2021-12-14 12:48:41,120 INFO L78 Accepts]: Start accepts. Automaton has 124883 states and 136851 transitions. Word has length 535 [2021-12-14 12:48:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:48:41,120 INFO L470 AbstractCegarLoop]: Abstraction has 124883 states and 136851 transitions. [2021-12-14 12:48:41,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 12:48:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 124883 states and 136851 transitions. [2021-12-14 12:48:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2021-12-14 12:48:41,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:48:41,134 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 12:48:41,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 12:48:41,134 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:48:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:48:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2138858339, now seen corresponding path program 1 times [2021-12-14 12:48:41,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:48:41,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541347420] [2021-12-14 12:48:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:48:41,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:48:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:48:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-14 12:48:41,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:48:41,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541347420] [2021-12-14 12:48:41,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541347420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:48:41,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:48:41,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 12:48:41,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274171779] [2021-12-14 12:48:41,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:48:41,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:48:41,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:48:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:48:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:48:41,269 INFO L87 Difference]: Start difference. First operand 124883 states and 136851 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)