./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_label37.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 8bd98135d8ae582748799a59c9940e3e8b9dde2a3b5c340030fcdb71a0e998f7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:37:10,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:37:10,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:37:10,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:37:10,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:37:10,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:37:10,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:37:10,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:37:10,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:37:10,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:37:10,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:37:10,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:37:10,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:37:10,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:37:10,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:37:10,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:37:10,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:37:10,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:37:10,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:37:10,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:37:10,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:37:10,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:37:10,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:37:10,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:37:10,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:37:10,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:37:10,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:37:10,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:37:10,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:37:10,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:37:10,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:37:10,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:37:10,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:37:10,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:37:10,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:37:10,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:37:10,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:37:10,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:37:10,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:37:10,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:37:10,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:37:10,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:37:10,320 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:37:10,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:37:10,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:37:10,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:37:10,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:37:10,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:37:10,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:37:10,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:37:10,325 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:37:10,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:37:10,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:37:10,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:37:10,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:37:10,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:37:10,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:37:10,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:37:10,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:37:10,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:37:10,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:37:10,328 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:37:10,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:37:10,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:37:10,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:37:10,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:37:10,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:37:10,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:37:10,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:37:10,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:37:10,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:37:10,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:37:10,330 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:37:10,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:37:10,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:37:10,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:37:10,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd98135d8ae582748799a59c9940e3e8b9dde2a3b5c340030fcdb71a0e998f7 [2021-12-22 09:37:10,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:37:10,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:37:10,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:37:10,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:37:10,594 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:37:10,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label37.c [2021-12-22 09:37:10,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa507536f/6e51872cb5c14e05a1cea27749dfb0ab/FLAG1b7ab8cb8 [2021-12-22 09:37:11,236 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:37:11,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label37.c [2021-12-22 09:37:11,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa507536f/6e51872cb5c14e05a1cea27749dfb0ab/FLAG1b7ab8cb8 [2021-12-22 09:37:11,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa507536f/6e51872cb5c14e05a1cea27749dfb0ab [2021-12-22 09:37:11,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:37:11,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:37:11,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:37:11,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:37:11,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:37:11,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:11" (1/1) ... [2021-12-22 09:37:11,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc0e96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11, skipping insertion in model container [2021-12-22 09:37:11,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:11" (1/1) ... [2021-12-22 09:37:11,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:37:11,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:37:11,765 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_label37.c[2848,2861] [2021-12-22 09:37:12,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:37:12,272 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:37:12,296 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_label37.c[2848,2861] [2021-12-22 09:37:12,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:37:12,565 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:37:12,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12 WrapperNode [2021-12-22 09:37:12,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:37:12,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:37:12,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:37:12,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:37:12,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:12,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:12,903 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-22 09:37:12,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:37:12,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:37:12,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:37:12,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:37:12,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:12,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:12,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:12,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:13,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:13,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:13,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:13,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:37:13,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:37:13,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:37:13,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:37:13,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (1/1) ... [2021-12-22 09:37:13,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:37:13,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:37:13,352 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) [2021-12-22 09:37:13,380 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 [2021-12-22 09:37:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:37:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:37:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:37:13,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:37:13,458 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:37:13,460 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:37:16,293 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:37:16,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:37:16,307 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:37:16,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:16 BoogieIcfgContainer [2021-12-22 09:37:16,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:37:16,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:37:16,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:37:16,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:37:16,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:11" (1/3) ... [2021-12-22 09:37:16,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf9a0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:16, skipping insertion in model container [2021-12-22 09:37:16,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12" (2/3) ... [2021-12-22 09:37:16,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf9a0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:16, skipping insertion in model container [2021-12-22 09:37:16,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:16" (3/3) ... [2021-12-22 09:37:16,316 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label37.c [2021-12-22 09:37:16,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:37:16,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:37:16,359 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:37:16,364 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 [2021-12-22 09:37:16,365 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:37:16,385 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) [2021-12-22 09:37:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 09:37:16,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:16,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:16,391 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2021-12-22 09:37:16,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:16,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833111437] [2021-12-22 09:37:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:16,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:37:16,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833111437] [2021-12-22 09:37:16,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833111437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:16,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:16,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:37:16,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685962357] [2021-12-22 09:37:16,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:16,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:16,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:16,592 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:19,348 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-22 09:37:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-22 09:37:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:19,366 INFO L225 Difference]: With dead ends: 1667 [2021-12-22 09:37:19,366 INFO L226 Difference]: Without dead ends: 998 [2021-12-22 09:37:19,371 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 [2021-12-22 09:37:19,373 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 527 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:19,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 09:37:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-22 09:37:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-22 09:37:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-22 09:37:19,442 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 18 [2021-12-22 09:37:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:19,443 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-22 09:37:19,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-22 09:37:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 09:37:19,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:19,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:19,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:37:19,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash 581142199, now seen corresponding path program 1 times [2021-12-22 09:37:19,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944096729] [2021-12-22 09:37:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:19,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:37:19,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:19,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944096729] [2021-12-22 09:37:19,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944096729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:19,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:19,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:37:19,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565366743] [2021-12-22 09:37:19,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:19,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:19,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:19,595 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:21,856 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-12-22 09:37:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-22 09:37:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:21,865 INFO L225 Difference]: With dead ends: 2841 [2021-12-22 09:37:21,865 INFO L226 Difference]: Without dead ends: 1861 [2021-12-22 09:37:21,866 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 [2021-12-22 09:37:21,868 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:21,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 09:37:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-22 09:37:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-12-22 09:37:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-12-22 09:37:21,905 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 83 [2021-12-22 09:37:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:21,905 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-12-22 09:37:21,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-12-22 09:37:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 09:37:21,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:21,910 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:37:21,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:37:21,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash -252550036, now seen corresponding path program 1 times [2021-12-22 09:37:21,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781179001] [2021-12-22 09:37:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:21,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:37:22,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:22,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781179001] [2021-12-22 09:37:22,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781179001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:22,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:22,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:37:22,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974684505] [2021-12-22 09:37:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:22,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:22,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:22,032 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:24,529 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-12-22 09:37:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:24,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-22 09:37:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:24,540 INFO L225 Difference]: With dead ends: 4591 [2021-12-22 09:37:24,540 INFO L226 Difference]: Without dead ends: 2736 [2021-12-22 09:37:24,542 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 [2021-12-22 09:37:24,543 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:24,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:37:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-12-22 09:37:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-12-22 09:37:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-12-22 09:37:24,587 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 123 [2021-12-22 09:37:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:24,588 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-12-22 09:37:24,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-12-22 09:37:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 09:37:24,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:24,591 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:37:24,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:37:24,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash -800106755, now seen corresponding path program 1 times [2021-12-22 09:37:24,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795942769] [2021-12-22 09:37:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:24,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:37:24,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795942769] [2021-12-22 09:37:24,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795942769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:24,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:24,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:37:24,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953005394] [2021-12-22 09:37:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:24,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:24,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:24,759 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:26,512 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2021-12-22 09:37:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-12-22 09:37:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:26,527 INFO L225 Difference]: With dead ends: 6709 [2021-12-22 09:37:26,527 INFO L226 Difference]: Without dead ends: 3995 [2021-12-22 09:37:26,531 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 [2021-12-22 09:37:26,532 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 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, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:26,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:37:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-12-22 09:37:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-12-22 09:37:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-12-22 09:37:26,582 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 129 [2021-12-22 09:37:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:26,583 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-12-22 09:37:26,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-12-22 09:37:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-22 09:37:26,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:26,585 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:26,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:37:26,586 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash -345110489, now seen corresponding path program 1 times [2021-12-22 09:37:26,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:26,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533214561] [2021-12-22 09:37:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:26,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:37:26,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533214561] [2021-12-22 09:37:26,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533214561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:26,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:26,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 09:37:26,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342586525] [2021-12-22 09:37:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:26,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:37:26,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:37:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:37:26,696 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:29,265 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2021-12-22 09:37:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:37:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-12-22 09:37:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:29,283 INFO L225 Difference]: With dead ends: 8019 [2021-12-22 09:37:29,283 INFO L226 Difference]: Without dead ends: 4879 [2021-12-22 09:37:29,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:37:29,292 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:29,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:37:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-12-22 09:37:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2021-12-22 09:37:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-12-22 09:37:29,375 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 166 [2021-12-22 09:37:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:29,377 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-12-22 09:37:29,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-12-22 09:37:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-22 09:37:29,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:29,383 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:29,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:37:29,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:29,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1150942888, now seen corresponding path program 1 times [2021-12-22 09:37:29,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:29,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487675034] [2021-12-22 09:37:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:29,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 09:37:29,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487675034] [2021-12-22 09:37:29,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487675034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:29,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:29,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:29,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849077932] [2021-12-22 09:37:29,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:29,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:29,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:29,504 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:31,541 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-12-22 09:37:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 172 [2021-12-22 09:37:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:31,564 INFO L225 Difference]: With dead ends: 12249 [2021-12-22 09:37:31,564 INFO L226 Difference]: Without dead ends: 7399 [2021-12-22 09:37:31,570 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 [2021-12-22 09:37:31,572 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 430 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:31,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 09:37:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-12-22 09:37:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-12-22 09:37:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-12-22 09:37:31,663 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 172 [2021-12-22 09:37:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:31,663 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-12-22 09:37:31,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-12-22 09:37:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 09:37:31,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:31,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:31,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:37:31,666 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash 592869292, now seen corresponding path program 1 times [2021-12-22 09:37:31,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481882863] [2021-12-22 09:37:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:31,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:37:31,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:31,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481882863] [2021-12-22 09:37:31,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481882863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:31,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:31,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:31,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785241231] [2021-12-22 09:37:31,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:31,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:31,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:31,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:31,761 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:33,708 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2021-12-22 09:37:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 185 [2021-12-22 09:37:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:33,768 INFO L225 Difference]: With dead ends: 13481 [2021-12-22 09:37:33,769 INFO L226 Difference]: Without dead ends: 8657 [2021-12-22 09:37:33,773 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 [2021-12-22 09:37:33,774 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 466 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:33,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 09:37:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2021-12-22 09:37:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2021-12-22 09:37:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2021-12-22 09:37:33,876 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 185 [2021-12-22 09:37:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:33,877 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2021-12-22 09:37:33,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2021-12-22 09:37:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-22 09:37:33,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:33,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:33,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:37:33,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1562276696, now seen corresponding path program 1 times [2021-12-22 09:37:33,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:33,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352943625] [2021-12-22 09:37:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:33,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:37:33,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:33,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352943625] [2021-12-22 09:37:33,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352943625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:33,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:33,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:33,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519523650] [2021-12-22 09:37:33,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:33,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:33,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:33,997 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:36,116 INFO L93 Difference]: Finished difference Result 18607 states and 23435 transitions. [2021-12-22 09:37:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:36,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 234 [2021-12-22 09:37:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:36,132 INFO L225 Difference]: With dead ends: 18607 [2021-12-22 09:37:36,132 INFO L226 Difference]: Without dead ends: 10379 [2021-12-22 09:37:36,141 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 [2021-12-22 09:37:36,141 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 482 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:36,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 1020 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 09:37:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2021-12-22 09:37:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10371. [2021-12-22 09:37:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 1.2060752169720348) internal successors, (12507), 10370 states have internal predecessors, (12507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 12507 transitions. [2021-12-22 09:37:36,302 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 12507 transitions. Word has length 234 [2021-12-22 09:37:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:36,303 INFO L470 AbstractCegarLoop]: Abstraction has 10371 states and 12507 transitions. [2021-12-22 09:37:36,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 12507 transitions. [2021-12-22 09:37:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-22 09:37:36,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:36,306 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:37:36,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash -408685212, now seen corresponding path program 1 times [2021-12-22 09:37:36,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:36,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917311385] [2021-12-22 09:37:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:36,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 09:37:36,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:36,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917311385] [2021-12-22 09:37:36,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917311385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481489313] [2021-12-22 09:37:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:36,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:37:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:37:36,451 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) [2021-12-22 09:37:36,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:37:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:37:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:37:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 09:37:37,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:37:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 09:37:37,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481489313] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:37,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:37:37,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-22 09:37:37,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57447274] [2021-12-22 09:37:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:37:37,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:37:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:37:37,828 INFO L87 Difference]: Start difference. First operand 10371 states and 12507 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) [2021-12-22 09:37:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:41,062 INFO L93 Difference]: Finished difference Result 32691 states and 39751 transitions. [2021-12-22 09:37:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:37:41,063 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 242 [2021-12-22 09:37:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:41,101 INFO L225 Difference]: With dead ends: 32691 [2021-12-22 09:37:41,101 INFO L226 Difference]: Without dead ends: 21461 [2021-12-22 09:37:41,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 479 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:37:41,116 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 904 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:41,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 158 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 09:37:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21461 states. [2021-12-22 09:37:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21461 to 21459. [2021-12-22 09:37:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21459 states, 21458 states have (on average 1.1587752819461272) internal successors, (24865), 21458 states have internal predecessors, (24865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21459 states to 21459 states and 24865 transitions. [2021-12-22 09:37:41,366 INFO L78 Accepts]: Start accepts. Automaton has 21459 states and 24865 transitions. Word has length 242 [2021-12-22 09:37:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:41,366 INFO L470 AbstractCegarLoop]: Abstraction has 21459 states and 24865 transitions. [2021-12-22 09:37:41,367 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) [2021-12-22 09:37:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 21459 states and 24865 transitions. [2021-12-22 09:37:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-22 09:37:41,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:41,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:41,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:37:41,586 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 [2021-12-22 09:37:41,587 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash 302196312, now seen corresponding path program 1 times [2021-12-22 09:37:41,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472152016] [2021-12-22 09:37:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:41,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 09:37:41,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472152016] [2021-12-22 09:37:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472152016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:41,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:41,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:41,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405711840] [2021-12-22 09:37:41,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:41,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:41,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:41,697 INFO L87 Difference]: Start difference. First operand 21459 states and 24865 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:43,293 INFO L93 Difference]: Finished difference Result 47592 states and 55279 transitions. [2021-12-22 09:37:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 255 [2021-12-22 09:37:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:43,333 INFO L225 Difference]: With dead ends: 47592 [2021-12-22 09:37:43,334 INFO L226 Difference]: Without dead ends: 25708 [2021-12-22 09:37:43,355 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 [2021-12-22 09:37:43,356 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:43,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 860 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:37:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2021-12-22 09:37:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 25708. [2021-12-22 09:37:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 25707 states have (on average 1.1349048897187537) internal successors, (29175), 25707 states have internal predecessors, (29175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 29175 transitions. [2021-12-22 09:37:43,673 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 29175 transitions. Word has length 255 [2021-12-22 09:37:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:43,673 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 29175 transitions. [2021-12-22 09:37:43,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 29175 transitions. [2021-12-22 09:37:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-22 09:37:43,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:43,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:43,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:37:43,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 81778786, now seen corresponding path program 1 times [2021-12-22 09:37:43,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010618542] [2021-12-22 09:37:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:43,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 311 proven. 73 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 09:37:43,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010618542] [2021-12-22 09:37:43,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010618542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:43,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625402794] [2021-12-22 09:37:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:43,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:37:43,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:37:43,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:37:43,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:37:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:37:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:37:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 311 proven. 73 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 09:37:44,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:37:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 09:37:45,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625402794] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:45,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:37:45,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-22 09:37:45,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708703055] [2021-12-22 09:37:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:45,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:37:45,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:37:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:37:45,401 INFO L87 Difference]: Start difference. First operand 25708 states and 29175 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:48,349 INFO L93 Difference]: Finished difference Result 62499 states and 71199 transitions. [2021-12-22 09:37:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:37:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 316 [2021-12-22 09:37:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:48,397 INFO L225 Difference]: With dead ends: 62499 [2021-12-22 09:37:48,398 INFO L226 Difference]: Without dead ends: 36366 [2021-12-22 09:37:48,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 627 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:37:48,417 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 843 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:48,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 195 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 09:37:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36366 states. [2021-12-22 09:37:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36366 to 34238. [2021-12-22 09:37:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34238 states, 34237 states have (on average 1.1454566696848438) internal successors, (39217), 34237 states have internal predecessors, (39217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34238 states to 34238 states and 39217 transitions. [2021-12-22 09:37:48,795 INFO L78 Accepts]: Start accepts. Automaton has 34238 states and 39217 transitions. Word has length 316 [2021-12-22 09:37:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:48,796 INFO L470 AbstractCegarLoop]: Abstraction has 34238 states and 39217 transitions. [2021-12-22 09:37:48,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34238 states and 39217 transitions. [2021-12-22 09:37:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-12-22 09:37:48,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:48,808 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:48,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:37:49,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 09:37:49,031 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2138614133, now seen corresponding path program 1 times [2021-12-22 09:37:49,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477105258] [2021-12-22 09:37:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:49,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2021-12-22 09:37:49,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:49,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477105258] [2021-12-22 09:37:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477105258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:49,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:49,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:49,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092903820] [2021-12-22 09:37:49,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:49,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:49,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:49,264 INFO L87 Difference]: Start difference. First operand 34238 states and 39217 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:51,128 INFO L93 Difference]: Finished difference Result 80388 states and 92354 transitions. [2021-12-22 09:37:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 439 [2021-12-22 09:37:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:51,185 INFO L225 Difference]: With dead ends: 80388 [2021-12-22 09:37:51,185 INFO L226 Difference]: Without dead ends: 45725 [2021-12-22 09:37:51,220 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 [2021-12-22 09:37:51,221 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 486 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:51,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 255 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:37:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45725 states. [2021-12-22 09:37:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45725 to 33771. [2021-12-22 09:37:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33771 states, 33770 states have (on average 1.1432928634883033) internal successors, (38609), 33770 states have internal predecessors, (38609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33771 states to 33771 states and 38609 transitions. [2021-12-22 09:37:51,749 INFO L78 Accepts]: Start accepts. Automaton has 33771 states and 38609 transitions. Word has length 439 [2021-12-22 09:37:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 33771 states and 38609 transitions. [2021-12-22 09:37:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33771 states and 38609 transitions. [2021-12-22 09:37:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-22 09:37:51,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:51,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:51,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:37:51,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1984090076, now seen corresponding path program 1 times [2021-12-22 09:37:51,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:51,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008875413] [2021-12-22 09:37:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:51,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 09:37:51,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:51,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008875413] [2021-12-22 09:37:51,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008875413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:51,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:51,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:51,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707611681] [2021-12-22 09:37:51,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:51,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:51,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:51,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:51,935 INFO L87 Difference]: Start difference. First operand 33771 states and 38609 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:53,688 INFO L93 Difference]: Finished difference Result 80766 states and 92383 transitions. [2021-12-22 09:37:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 451 [2021-12-22 09:37:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:53,728 INFO L225 Difference]: With dead ends: 80766 [2021-12-22 09:37:53,728 INFO L226 Difference]: Without dead ends: 43595 [2021-12-22 09:37:53,743 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 [2021-12-22 09:37:53,744 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 372 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:53,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 846 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:37:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43595 states. [2021-12-22 09:37:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43595 to 38898. [2021-12-22 09:37:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38898 states, 38897 states have (on average 1.1182610484099031) internal successors, (43497), 38897 states have internal predecessors, (43497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38898 states to 38898 states and 43497 transitions. [2021-12-22 09:37:54,344 INFO L78 Accepts]: Start accepts. Automaton has 38898 states and 43497 transitions. Word has length 451 [2021-12-22 09:37:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:54,345 INFO L470 AbstractCegarLoop]: Abstraction has 38898 states and 43497 transitions. [2021-12-22 09:37:54,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 38898 states and 43497 transitions. [2021-12-22 09:37:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-12-22 09:37:54,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:54,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:54,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:37:54,358 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash -115130207, now seen corresponding path program 1 times [2021-12-22 09:37:54,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128058775] [2021-12-22 09:37:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:54,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 300 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:37:54,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128058775] [2021-12-22 09:37:54,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128058775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130365201] [2021-12-22 09:37:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:54,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:37:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:37:54,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:37:54,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:37:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 09:37:54,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:37:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 218 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 09:37:55,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:37:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 218 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 09:37:57,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130365201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:37:57,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:37:57,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-22 09:37:57,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549423253] [2021-12-22 09:37:57,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:37:57,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:37:57,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:57,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:37:57,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:37:57,146 INFO L87 Difference]: Start difference. First operand 38898 states and 43497 transitions. Second operand has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)