./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem10_label53.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/Problem10_label53.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 2111cb29f1bd8b3fb4b298a000ff36aa114949c5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 20:27:44,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 20:27:44,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 20:27:44,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 20:27:44,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 20:27:44,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 20:27:44,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 20:27:44,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 20:27:44,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 20:27:44,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 20:27:44,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 20:27:44,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 20:27:44,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 20:27:44,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 20:27:44,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 20:27:44,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 20:27:44,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 20:27:44,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 20:27:44,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 20:27:44,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 20:27:44,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 20:27:44,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 20:27:44,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 20:27:44,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 20:27:44,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 20:27:44,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 20:27:44,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 20:27:44,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 20:27:44,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 20:27:44,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 20:27:44,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 20:27:44,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 20:27:44,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 20:27:44,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 20:27:44,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 20:27:44,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 20:27:44,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 20:27:44,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 20:27:44,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 20:27:44,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 20:27:44,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 20:27:44,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 20:27:44,359 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 20:27:44,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 20:27:44,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 20:27:44,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 20:27:44,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 20:27:44,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 20:27:44,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 20:27:44,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 20:27:44,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 20:27:44,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 20:27:44,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 20:27:44,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 20:27:44,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 20:27:44,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 20:27:44,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 20:27:44,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 20:27:44,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 20:27:44,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 20:27:44,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 20:27:44,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 20:27:44,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 20:27:44,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 20:27:44,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 20:27:44,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 20:27:44,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 20:27:44,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 20:27:44,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 20:27:44,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 20:27:44,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 20:27:44,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2111cb29f1bd8b3fb4b298a000ff36aa114949c5 [2020-10-25 20:27:44,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 20:27:44,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 20:27:44,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 20:27:44,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 20:27:44,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 20:27:44,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem10_label53.c [2020-10-25 20:27:44,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2359d8d3/59eab817f0774266a75e5df43aad3f15/FLAG5af695219 [2020-10-25 20:27:45,741 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 20:27:45,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem10_label53.c [2020-10-25 20:27:45,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2359d8d3/59eab817f0774266a75e5df43aad3f15/FLAG5af695219 [2020-10-25 20:27:45,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2359d8d3/59eab817f0774266a75e5df43aad3f15 [2020-10-25 20:27:45,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 20:27:45,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 20:27:45,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 20:27:45,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 20:27:45,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 20:27:45,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 08:27:45" (1/1) ... [2020-10-25 20:27:45,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fba1f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:45, skipping insertion in model container [2020-10-25 20:27:45,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 08:27:45" (1/1) ... [2020-10-25 20:27:46,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 20:27:46,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 20:27:46,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 20:27:46,534 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 20:27:46,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 20:27:46,761 INFO L208 MainTranslator]: Completed translation [2020-10-25 20:27:46,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46 WrapperNode [2020-10-25 20:27:46,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 20:27:46,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 20:27:46,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 20:27:46,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 20:27:46,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 20:27:46,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 20:27:46,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 20:27:46,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 20:27:46,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... [2020-10-25 20:27:46,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 20:27:46,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 20:27:46,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 20:27:46,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 20:27:46,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 20:27:47,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 20:27:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 20:27:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 20:27:47,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 20:27:48,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 20:27:48,652 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 20:27:48,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 08:27:48 BoogieIcfgContainer [2020-10-25 20:27:48,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 20:27:48,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 20:27:48,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 20:27:48,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 20:27:48,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 08:27:45" (1/3) ... [2020-10-25 20:27:48,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffb553a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 08:27:48, skipping insertion in model container [2020-10-25 20:27:48,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 08:27:46" (2/3) ... [2020-10-25 20:27:48,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffb553a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 08:27:48, skipping insertion in model container [2020-10-25 20:27:48,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 08:27:48" (3/3) ... [2020-10-25 20:27:48,664 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label53.c [2020-10-25 20:27:48,679 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 20:27:48,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 20:27:48,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 20:27:48,731 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 20:27:48,731 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 20:27:48,732 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 20:27:48,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 20:27:48,732 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 20:27:48,732 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 20:27:48,732 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 20:27:48,732 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 20:27:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2020-10-25 20:27:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-25 20:27:48,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:48,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 20:27:48,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2020-10-25 20:27:48,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:48,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321749461] [2020-10-25 20:27:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:49,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321749461] [2020-10-25 20:27:49,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:49,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 20:27:49,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308235355] [2020-10-25 20:27:49,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 20:27:49,142 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2020-10-25 20:27:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:50,293 INFO L93 Difference]: Finished difference Result 553 states and 967 transitions. [2020-10-25 20:27:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:50,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-10-25 20:27:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:50,333 INFO L225 Difference]: With dead ends: 553 [2020-10-25 20:27:50,333 INFO L226 Difference]: Without dead ends: 282 [2020-10-25 20:27:50,343 INFO L677 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 [2020-10-25 20:27:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-25 20:27:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-25 20:27:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-25 20:27:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 377 transitions. [2020-10-25 20:27:50,408 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 377 transitions. Word has length 42 [2020-10-25 20:27:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:50,408 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 377 transitions. [2020-10-25 20:27:50,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 377 transitions. [2020-10-25 20:27:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-25 20:27:50,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:50,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 20:27:50,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 20:27:50,414 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash 377951494, now seen corresponding path program 1 times [2020-10-25 20:27:50,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:50,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132781256] [2020-10-25 20:27:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132781256] [2020-10-25 20:27:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 20:27:50,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732847617] [2020-10-25 20:27:50,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:50,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:50,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 20:27:50,663 INFO L87 Difference]: Start difference. First operand 282 states and 377 transitions. Second operand 3 states. [2020-10-25 20:27:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:51,559 INFO L93 Difference]: Finished difference Result 701 states and 967 transitions. [2020-10-25 20:27:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:51,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-10-25 20:27:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:51,565 INFO L225 Difference]: With dead ends: 701 [2020-10-25 20:27:51,565 INFO L226 Difference]: Without dead ends: 421 [2020-10-25 20:27:51,568 INFO L677 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 [2020-10-25 20:27:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-25 20:27:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2020-10-25 20:27:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-25 20:27:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 526 transitions. [2020-10-25 20:27:51,614 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 526 transitions. Word has length 108 [2020-10-25 20:27:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:51,617 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 526 transitions. [2020-10-25 20:27:51,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 526 transitions. [2020-10-25 20:27:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-25 20:27:51,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:51,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 20:27:51,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 20:27:51,628 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:51,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1431286821, now seen corresponding path program 1 times [2020-10-25 20:27:51,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:51,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369503304] [2020-10-25 20:27:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:51,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369503304] [2020-10-25 20:27:51,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:51,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 20:27:51,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012322494] [2020-10-25 20:27:51,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:51,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:51,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 20:27:51,803 INFO L87 Difference]: Start difference. First operand 421 states and 526 transitions. Second operand 3 states. [2020-10-25 20:27:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:52,663 INFO L93 Difference]: Finished difference Result 979 states and 1209 transitions. [2020-10-25 20:27:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:52,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-10-25 20:27:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:52,671 INFO L225 Difference]: With dead ends: 979 [2020-10-25 20:27:52,672 INFO L226 Difference]: Without dead ends: 560 [2020-10-25 20:27:52,678 INFO L677 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 [2020-10-25 20:27:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-25 20:27:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2020-10-25 20:27:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-10-25 20:27:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 675 transitions. [2020-10-25 20:27:52,724 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 675 transitions. Word has length 115 [2020-10-25 20:27:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:52,725 INFO L481 AbstractCegarLoop]: Abstraction has 560 states and 675 transitions. [2020-10-25 20:27:52,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 675 transitions. [2020-10-25 20:27:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-25 20:27:52,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:52,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 20:27:52,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 20:27:52,730 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -476608426, now seen corresponding path program 1 times [2020-10-25 20:27:52,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:52,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910617319] [2020-10-25 20:27:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:53,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910617319] [2020-10-25 20:27:53,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010069136] [2020-10-25 20:27:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 20:27:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 20:27:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 20:27:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:53,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 20:27:53,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-10-25 20:27:53,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387610060] [2020-10-25 20:27:53,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:53,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-25 20:27:53,274 INFO L87 Difference]: Start difference. First operand 560 states and 675 transitions. Second operand 3 states. [2020-10-25 20:27:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:54,310 INFO L93 Difference]: Finished difference Result 1118 states and 1414 transitions. [2020-10-25 20:27:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:54,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-10-25 20:27:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:54,315 INFO L225 Difference]: With dead ends: 1118 [2020-10-25 20:27:54,315 INFO L226 Difference]: Without dead ends: 699 [2020-10-25 20:27:54,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-25 20:27:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-25 20:27:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 699. [2020-10-25 20:27:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-10-25 20:27:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 859 transitions. [2020-10-25 20:27:54,337 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 859 transitions. Word has length 117 [2020-10-25 20:27:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:54,338 INFO L481 AbstractCegarLoop]: Abstraction has 699 states and 859 transitions. [2020-10-25 20:27:54,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 859 transitions. [2020-10-25 20:27:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-25 20:27:54,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:54,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 20:27:54,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 20:27:54,561 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:54,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1769423826, now seen corresponding path program 1 times [2020-10-25 20:27:54,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:54,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559420282] [2020-10-25 20:27:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:54,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559420282] [2020-10-25 20:27:54,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:54,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 20:27:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136057262] [2020-10-25 20:27:54,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:54,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 20:27:54,760 INFO L87 Difference]: Start difference. First operand 699 states and 859 transitions. Second operand 3 states. [2020-10-25 20:27:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:55,570 INFO L93 Difference]: Finished difference Result 1535 states and 1910 transitions. [2020-10-25 20:27:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:55,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-10-25 20:27:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:55,578 INFO L225 Difference]: With dead ends: 1535 [2020-10-25 20:27:55,578 INFO L226 Difference]: Without dead ends: 977 [2020-10-25 20:27:55,581 INFO L677 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 [2020-10-25 20:27:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2020-10-25 20:27:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2020-10-25 20:27:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-25 20:27:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1137 transitions. [2020-10-25 20:27:55,614 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1137 transitions. Word has length 133 [2020-10-25 20:27:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:55,615 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 1137 transitions. [2020-10-25 20:27:55,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1137 transitions. [2020-10-25 20:27:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-25 20:27:55,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:55,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-25 20:27:55,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 20:27:55,624 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash 143968287, now seen corresponding path program 1 times [2020-10-25 20:27:55,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:55,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556490585] [2020-10-25 20:27:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 20:27:56,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556490585] [2020-10-25 20:27:56,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:56,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 20:27:56,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483547785] [2020-10-25 20:27:56,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 20:27:56,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 20:27:56,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 20:27:56,030 INFO L87 Difference]: Start difference. First operand 977 states and 1137 transitions. Second operand 7 states. [2020-10-25 20:27:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:56,784 INFO L93 Difference]: Finished difference Result 1868 states and 2183 transitions. [2020-10-25 20:27:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 20:27:56,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 190 [2020-10-25 20:27:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:56,791 INFO L225 Difference]: With dead ends: 1868 [2020-10-25 20:27:56,791 INFO L226 Difference]: Without dead ends: 977 [2020-10-25 20:27:56,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 20:27:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2020-10-25 20:27:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2020-10-25 20:27:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-25 20:27:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1131 transitions. [2020-10-25 20:27:56,818 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1131 transitions. Word has length 190 [2020-10-25 20:27:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:56,818 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 1131 transitions. [2020-10-25 20:27:56,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 20:27:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1131 transitions. [2020-10-25 20:27:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-25 20:27:56,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:56,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-25 20:27:56,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 20:27:56,823 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1772431815, now seen corresponding path program 1 times [2020-10-25 20:27:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:56,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675109782] [2020-10-25 20:27:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-25 20:27:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675109782] [2020-10-25 20:27:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216922538] [2020-10-25 20:27:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 20:27:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 20:27:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 20:27:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-25 20:27:57,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 20:27:57,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-10-25 20:27:57,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6551112] [2020-10-25 20:27:57,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:57,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:57,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 20:27:57,451 INFO L87 Difference]: Start difference. First operand 977 states and 1131 transitions. Second operand 3 states. [2020-10-25 20:27:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:58,235 INFO L93 Difference]: Finished difference Result 1535 states and 1776 transitions. [2020-10-25 20:27:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:58,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2020-10-25 20:27:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:58,246 INFO L225 Difference]: With dead ends: 1535 [2020-10-25 20:27:58,246 INFO L226 Difference]: Without dead ends: 1533 [2020-10-25 20:27:58,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 20:27:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2020-10-25 20:27:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1116. [2020-10-25 20:27:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2020-10-25 20:27:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1319 transitions. [2020-10-25 20:27:58,280 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1319 transitions. Word has length 226 [2020-10-25 20:27:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:58,281 INFO L481 AbstractCegarLoop]: Abstraction has 1116 states and 1319 transitions. [2020-10-25 20:27:58,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1319 transitions. [2020-10-25 20:27:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-25 20:27:58,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:58,288 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-25 20:27:58,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 20:27:58,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1502268007, now seen corresponding path program 1 times [2020-10-25 20:27:58,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:58,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705140483] [2020-10-25 20:27:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-25 20:27:58,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705140483] [2020-10-25 20:27:58,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:58,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 20:27:58,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861782377] [2020-10-25 20:27:58,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:58,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 20:27:58,761 INFO L87 Difference]: Start difference. First operand 1116 states and 1319 transitions. Second operand 3 states. [2020-10-25 20:27:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:27:59,520 INFO L93 Difference]: Finished difference Result 2369 states and 2870 transitions. [2020-10-25 20:27:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:27:59,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 290 [2020-10-25 20:27:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:27:59,530 INFO L225 Difference]: With dead ends: 2369 [2020-10-25 20:27:59,530 INFO L226 Difference]: Without dead ends: 1394 [2020-10-25 20:27:59,537 INFO L677 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 [2020-10-25 20:27:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2020-10-25 20:27:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1255. [2020-10-25 20:27:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1255 states. [2020-10-25 20:27:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1473 transitions. [2020-10-25 20:27:59,576 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1473 transitions. Word has length 290 [2020-10-25 20:27:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:27:59,577 INFO L481 AbstractCegarLoop]: Abstraction has 1255 states and 1473 transitions. [2020-10-25 20:27:59,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:27:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1473 transitions. [2020-10-25 20:27:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-25 20:27:59,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 20:27:59,586 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 20:27:59,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-25 20:27:59,586 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 20:27:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 20:27:59,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2092835213, now seen corresponding path program 1 times [2020-10-25 20:27:59,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 20:27:59,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980613916] [2020-10-25 20:27:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 20:27:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 20:27:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-25 20:27:59,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980613916] [2020-10-25 20:27:59,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 20:27:59,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 20:27:59,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398539171] [2020-10-25 20:27:59,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 20:27:59,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 20:27:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 20:27:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 20:27:59,928 INFO L87 Difference]: Start difference. First operand 1255 states and 1473 transitions. Second operand 3 states. [2020-10-25 20:28:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 20:28:00,690 INFO L93 Difference]: Finished difference Result 2645 states and 3102 transitions. [2020-10-25 20:28:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 20:28:00,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-10-25 20:28:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 20:28:00,693 INFO L225 Difference]: With dead ends: 2645 [2020-10-25 20:28:00,693 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 20:28:00,697 INFO L677 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 [2020-10-25 20:28:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 20:28:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 20:28:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 20:28:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 20:28:00,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 341 [2020-10-25 20:28:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 20:28:00,701 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 20:28:00,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 20:28:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 20:28:00,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 20:28:00,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-25 20:28:00,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 20:28:00,877 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-25 20:28:00,994 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-25 20:28:00,999 INFO L274 CegarLoopResult]: For program point L531(lines 531 574) no Hoare annotation was computed. [2020-10-25 20:28:00,999 INFO L274 CegarLoopResult]: For program point L432(lines 432 574) no Hoare annotation was computed. [2020-10-25 20:28:00,999 INFO L274 CegarLoopResult]: For program point L267(lines 267 574) no Hoare annotation was computed. [2020-10-25 20:28:00,999 INFO L274 CegarLoopResult]: For program point L201(line 201) no Hoare annotation was computed. [2020-10-25 20:28:00,999 INFO L274 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-10-25 20:28:01,000 INFO L274 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-10-25 20:28:01,000 INFO L274 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-10-25 20:28:01,004 INFO L274 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-10-25 20:28:01,004 INFO L274 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-10-25 20:28:01,004 INFO L274 CegarLoopResult]: For program point L565(lines 565 574) no Hoare annotation was computed. [2020-10-25 20:28:01,004 INFO L274 CegarLoopResult]: For program point L400(lines 400 574) no Hoare annotation was computed. [2020-10-25 20:28:01,005 INFO L274 CegarLoopResult]: For program point L367(lines 367 574) no Hoare annotation was computed. [2020-10-25 20:28:01,005 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L467(lines 467 574) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L203-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L170-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L137-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L104-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L71-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,006 INFO L274 CegarLoopResult]: For program point L38-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,007 INFO L274 CegarLoopResult]: For program point L501(lines 501 574) no Hoare annotation was computed. [2020-10-25 20:28:01,007 INFO L274 CegarLoopResult]: For program point L303(lines 303 574) no Hoare annotation was computed. [2020-10-25 20:28:01,007 INFO L274 CegarLoopResult]: For program point L204(line 204) no Hoare annotation was computed. [2020-10-25 20:28:01,009 INFO L274 CegarLoopResult]: For program point L171(line 171) no Hoare annotation was computed. [2020-10-25 20:28:01,009 INFO L274 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-10-25 20:28:01,009 INFO L274 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-10-25 20:28:01,009 INFO L274 CegarLoopResult]: For program point L72(line 72) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L337(lines 337 574) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L238(lines 238 574) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L536(lines 536 574) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L173-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L140-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L107-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L74-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,010 INFO L274 CegarLoopResult]: For program point L41-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,011 INFO L274 CegarLoopResult]: For program point L438(lines 438 574) no Hoare annotation was computed. [2020-10-25 20:28:01,011 INFO L274 CegarLoopResult]: For program point L405(lines 405 574) no Hoare annotation was computed. [2020-10-25 20:28:01,011 INFO L274 CegarLoopResult]: For program point L372(lines 372 574) no Hoare annotation was computed. [2020-10-25 20:28:01,011 INFO L274 CegarLoopResult]: For program point L273(lines 273 574) no Hoare annotation was computed. [2020-10-25 20:28:01,013 INFO L274 CegarLoopResult]: For program point L174(line 174) no Hoare annotation was computed. [2020-10-25 20:28:01,013 INFO L274 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-10-25 20:28:01,013 INFO L274 CegarLoopResult]: For program point L108(line 108) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L571(lines 571 574) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L241(lines 241 574) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L506(lines 506 574) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L473(lines 473 574) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L308(lines 308 574) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L176-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,014 INFO L274 CegarLoopResult]: For program point L143-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L110-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L77-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L44-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L342(lines 342 574) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L177(line 177) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-10-25 20:28:01,015 INFO L274 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-10-25 20:28:01,016 INFO L270 CegarLoopResult]: At program point L575(lines 22 576) the Hoare annotation is: (let ((.cse2 (<= ~a19~0 9)) (.cse0 (= 14 ~a4~0)) (.cse1 (= ~a12~0 0))) (or (and .cse0 (<= 9 ~a19~0) .cse1 .cse2) (and .cse0 .cse1 .cse2 (= ~a10~0 4)) (and .cse0 (= ~a10~0 2) .cse1 .cse2) (and .cse0 .cse1 (<= ~a19~0 6)) (and .cse0 .cse1 (<= ~a10~0 1)))) [2020-10-25 20:28:01,016 INFO L274 CegarLoopResult]: For program point L542(lines 542 574) no Hoare annotation was computed. [2020-10-25 20:28:01,016 INFO L274 CegarLoopResult]: For program point L410(lines 410 574) no Hoare annotation was computed. [2020-10-25 20:28:01,016 INFO L274 CegarLoopResult]: For program point L377(lines 377 574) no Hoare annotation was computed. [2020-10-25 20:28:01,016 INFO L274 CegarLoopResult]: For program point L212(lines 212 574) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L179-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L146-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L113-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L80-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L47-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L444(lines 444 574) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L279(lines 279 574) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L246(lines 246 574) no Hoare annotation was computed. [2020-10-25 20:28:01,017 INFO L274 CegarLoopResult]: For program point L180(line 180) no Hoare annotation was computed. [2020-10-25 20:28:01,018 INFO L274 CegarLoopResult]: For program point L147(line 147) no Hoare annotation was computed. [2020-10-25 20:28:01,018 INFO L274 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-10-25 20:28:01,018 INFO L274 CegarLoopResult]: For program point L81(line 81) no Hoare annotation was computed. [2020-10-25 20:28:01,018 INFO L274 CegarLoopResult]: For program point L48(line 48) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L511(lines 511 574) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L478(lines 478 574) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L277 CegarLoopResult]: At program point L578(lines 578 594) the Hoare annotation is: true [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L380(lines 380 574) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L347(lines 347 574) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L314(lines 314 574) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L182-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L149-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,020 INFO L274 CegarLoopResult]: For program point L116-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L83-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L50-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L183(line 183) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L150(line 150) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L117(line 117) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L547(lines 547 574) no Hoare annotation was computed. [2020-10-25 20:28:01,021 INFO L274 CegarLoopResult]: For program point L217(lines 217 574) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L416(lines 416 574) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L251(lines 251 574) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L185-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L152-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L119-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L86-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L53-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,022 INFO L274 CegarLoopResult]: For program point L516(lines 516 574) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L483(lines 483 574) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L450(lines 450 574) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L285(lines 285 574) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L186(line 186) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L54(line 54) no Hoare annotation was computed. [2020-10-25 20:28:01,023 INFO L274 CegarLoopResult]: For program point L550(lines 550 574) no Hoare annotation was computed. [2020-10-25 20:28:01,026 INFO L274 CegarLoopResult]: For program point L385(lines 385 574) no Hoare annotation was computed. [2020-10-25 20:28:01,026 INFO L274 CegarLoopResult]: For program point L319(lines 319 574) no Hoare annotation was computed. [2020-10-25 20:28:01,026 INFO L270 CegarLoopResult]: At program point L584-2(lines 584 593) the Hoare annotation is: (let ((.cse2 (<= ~a19~0 9)) (.cse0 (= 14 ~a4~0)) (.cse1 (= ~a12~0 0))) (or (and .cse0 (<= 9 ~a19~0) .cse1 .cse2) (and .cse0 .cse1 .cse2 (= ~a10~0 4)) (and .cse0 (= ~a10~0 2) .cse1 .cse2) (and .cse0 .cse1 (<= ~a19~0 6)) (and .cse0 .cse1 (<= ~a10~0 1)))) [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L353(lines 353 574) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L188-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L155-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L122-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L89-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L23(lines 23 25) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L56-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L23-2(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,027 INFO L274 CegarLoopResult]: For program point L519(lines 519 574) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L288(lines 288 574) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L222(lines 222 574) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L189(line 189) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-10-25 20:28:01,028 INFO L274 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-10-25 20:28:01,030 INFO L274 CegarLoopResult]: For program point L421(lines 421 574) no Hoare annotation was computed. [2020-10-25 20:28:01,030 INFO L274 CegarLoopResult]: For program point L322(lines 322 574) no Hoare annotation was computed. [2020-10-25 20:28:01,030 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 20:28:01,030 INFO L274 CegarLoopResult]: For program point L256(lines 256 574) no Hoare annotation was computed. [2020-10-25 20:28:01,030 INFO L274 CegarLoopResult]: For program point L356(lines 356 574) no Hoare annotation was computed. [2020-10-25 20:28:01,030 INFO L274 CegarLoopResult]: For program point L191-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L158-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L125-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L92-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L59-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L26-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L489(lines 489 574) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L456(lines 456 574) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L390(lines 390 574) no Hoare annotation was computed. [2020-10-25 20:28:01,031 INFO L274 CegarLoopResult]: For program point L192(line 192) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L159(line 159) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L589(line 589) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L556(lines 556 574) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L325(lines 325 574) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 20:28:01,032 INFO L274 CegarLoopResult]: For program point L359(lines 359 574) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L293(lines 293 574) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L227(lines 227 574) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L194-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L161-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L128-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L95-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L62-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L29-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,033 INFO L274 CegarLoopResult]: For program point L525(lines 525 574) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L195(line 195) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L162(line 162) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L63(line 63) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L559(lines 559 574) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L427(lines 427 574) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L328(lines 328 574) no Hoare annotation was computed. [2020-10-25 20:28:01,034 INFO L274 CegarLoopResult]: For program point L262(lines 262 574) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L395(lines 395 574) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L362(lines 362 574) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L197-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L164-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L131-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L98-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L65-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 20:28:01,035 INFO L274 CegarLoopResult]: For program point L32-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L528(lines 528 574) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L495(lines 495 574) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L462(lines 462 574) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L198(line 198) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L165(line 165) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L132(line 132) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L66(line 66) no Hoare annotation was computed. [2020-10-25 20:28:01,036 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L331(lines 331 574) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L298(lines 298 574) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L233(lines 233 574) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L200-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L167-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L134-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L101-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L68-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,037 INFO L274 CegarLoopResult]: For program point L35-1(lines 22 576) no Hoare annotation was computed. [2020-10-25 20:28:01,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 08:28:01 BoogieIcfgContainer [2020-10-25 20:28:01,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 20:28:01,083 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 20:28:01,083 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 20:28:01,083 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 20:28:01,084 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 08:27:48" (3/4) ... [2020-10-25 20:28:01,087 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 20:28:01,123 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-25 20:28:01,124 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 20:28:01,125 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 20:28:01,126 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 20:28:01,304 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 20:28:01,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 20:28:01,306 INFO L168 Benchmark]: Toolchain (without parser) took 15348.89 ms. Allocated memory was 50.3 MB in the beginning and 239.1 MB in the end (delta: 188.7 MB). Free memory was 25.7 MB in the beginning and 175.0 MB in the end (delta: -149.2 MB). Peak memory consumption was 40.4 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,306 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 39.8 MB. Free memory was 17.9 MB in the beginning and 17.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 20:28:01,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 798.99 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 30.7 MB in the end (delta: -5.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.01 ms. Allocated memory is still 50.3 MB. Free memory was 30.5 MB in the beginning and 22.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,307 INFO L168 Benchmark]: Boogie Preprocessor took 121.99 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 22.6 MB in the beginning and 36.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,308 INFO L168 Benchmark]: RCFGBuilder took 1665.79 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 36.0 MB in the beginning and 38.5 MB in the end (delta: -2.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,308 INFO L168 Benchmark]: TraceAbstraction took 12425.98 ms. Allocated memory was 73.4 MB in the beginning and 239.1 MB in the end (delta: 165.7 MB). Free memory was 38.1 MB in the beginning and 189.7 MB in the end (delta: -151.6 MB). Peak memory consumption was 134.6 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,309 INFO L168 Benchmark]: Witness Printer took 222.03 ms. Allocated memory is still 239.1 MB. Free memory was 189.7 MB in the beginning and 175.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-25 20:28:01,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 39.8 MB. Free memory was 17.9 MB in the beginning and 17.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 798.99 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 30.7 MB in the end (delta: -5.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.01 ms. Allocated memory is still 50.3 MB. Free memory was 30.5 MB in the beginning and 22.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 121.99 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 22.6 MB in the beginning and 36.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1665.79 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 36.0 MB in the beginning and 38.5 MB in the end (delta: -2.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12425.98 ms. Allocated memory was 73.4 MB in the beginning and 239.1 MB in the end (delta: 165.7 MB). Free memory was 38.1 MB in the beginning and 189.7 MB in the end (delta: -151.6 MB). Peak memory consumption was 134.6 MB. Max. memory is 16.1 GB. * Witness Printer took 222.03 ms. Allocated memory is still 239.1 MB. Free memory was 189.7 MB in the beginning and 175.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 578]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 584]: Loop Invariant Derived loop invariant: ((((((14 == a4 && 9 <= a19) && a12 == 0) && a19 <= 9) || (((14 == a4 && a12 == 0) && a19 <= 9) && a10 == 4)) || (((14 == a4 && a10 == 2) && a12 == 0) && a19 <= 9)) || ((14 == a4 && a12 == 0) && a19 <= 6)) || ((14 == a4 && a12 == 0) && a10 <= 1) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((14 == a4 && 9 <= a19) && a12 == 0) && a19 <= 9) || (((14 == a4 && a12 == 0) && a19 <= 9) && a10 == 4)) || (((14 == a4 && a10 == 2) && a12 == 0) && a19 <= 9)) || ((14 == a4 && a12 == 0) && a19 <= 6)) || ((14 == a4 && a12 == 0) && a10 <= 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 207 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 919 SDtfs, 986 SDslu, 44 SDs, 0 SdLazy, 3377 SolverSat, 520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 372 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1255occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 556 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 29 NumberOfFragments, 121 HoareAnnotationTreeSize, 3 FomulaSimplifications, 434 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 1905 NumberOfCodeBlocks, 1905 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1894 ConstructedInterpolants, 0 QuantifiedInterpolants, 1298074 SizeOfPredicates, 2 NumberOfNonLiveVariables, 555 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 1125/1211 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...