./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0 --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 e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:36:15,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:36:15,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:36:15,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:36:15,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:36:15,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:36:15,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:36:15,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:36:15,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:36:15,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:36:15,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:36:15,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:36:15,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:36:15,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:36:15,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:36:15,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:36:15,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:36:15,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:36:15,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:36:15,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:36:15,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:36:15,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:36:15,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:36:15,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:36:15,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:36:15,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:36:15,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:36:15,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:36:15,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:36:15,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:36:15,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:36:15,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:36:15,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:36:15,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:36:15,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:36:15,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:36:15,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:36:15,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:36:15,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:36:15,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:36:15,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:36:15,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:36:16,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:36:16,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:36:16,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:36:16,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:36:16,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:36:16,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:36:16,005 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:36:16,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:36:16,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:36:16,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:36:16,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:36:16,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:36:16,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:36:16,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:36:16,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:36:16,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:36:16,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:36:16,010 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:36:16,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:36:16,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:36:16,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:36:16,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:36:16,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:36:16,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:36:16,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:36:16,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:36:16,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:36:16,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:36:16,013 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:36:16,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:36:16,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:36:16,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:36:16,016 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af [2021-11-22 14:36:16,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:36:16,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:36:16,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:36:16,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:36:16,449 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:36:16,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2021-11-22 14:36:16,560 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/data/221a93d62/141420c325074dafaac9a4459a5d56ae/FLAG33a367181 [2021-11-22 14:36:17,380 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:36:17,381 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2021-11-22 14:36:17,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/data/221a93d62/141420c325074dafaac9a4459a5d56ae/FLAG33a367181 [2021-11-22 14:36:17,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/data/221a93d62/141420c325074dafaac9a4459a5d56ae [2021-11-22 14:36:17,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:36:17,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:36:17,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:36:17,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:36:17,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:36:17,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:36:17" (1/1) ... [2021-11-22 14:36:17,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f0d2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:17, skipping insertion in model container [2021-11-22 14:36:17,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:36:17" (1/1) ... [2021-11-22 14:36:17,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:36:17,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:36:18,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2021-11-22 14:36:18,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:36:18,510 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:36:18,818 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2021-11-22 14:36:18,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:36:18,870 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:36:18,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18 WrapperNode [2021-11-22 14:36:18,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:36:18,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:36:18,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:36:18,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:36:18,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:18,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,083 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-22 14:36:19,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:36:19,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:36:19,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:36:19,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:36:19,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:36:19,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:36:19,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:36:19,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:36:19,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (1/1) ... [2021-11-22 14:36:19,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:36:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:36:19,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:36:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:36:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:36:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:36:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:36:19,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:36:19,572 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:36:19,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:36:21,734 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:36:21,760 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:36:21,761 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 14:36:21,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:36:21 BoogieIcfgContainer [2021-11-22 14:36:21,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:36:21,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:36:21,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:36:21,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:36:21,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:36:17" (1/3) ... [2021-11-22 14:36:21,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70290189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:36:21, skipping insertion in model container [2021-11-22 14:36:21,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:36:18" (2/3) ... [2021-11-22 14:36:21,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70290189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:36:21, skipping insertion in model container [2021-11-22 14:36:21,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:36:21" (3/3) ... [2021-11-22 14:36:21,776 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2021-11-22 14:36:21,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:36:21,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:36:21,869 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:36:21,878 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:36:21,878 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:36:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-22 14:36:21,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:21,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:21,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:21,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1107694590, now seen corresponding path program 1 times [2021-11-22 14:36:21,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538132549] [2021-11-22 14:36:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:21,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:22,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538132549] [2021-11-22 14:36:22,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538132549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:22,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:22,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:22,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884474274] [2021-11-22 14:36:22,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:22,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:22,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:22,761 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:24,346 INFO L93 Difference]: Finished difference Result 840 states and 1490 transitions. [2021-11-22 14:36:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-22 14:36:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:24,382 INFO L225 Difference]: With dead ends: 840 [2021-11-22 14:36:24,383 INFO L226 Difference]: Without dead ends: 460 [2021-11-22 14:36:24,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:24,401 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 120 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:24,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 134 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-22 14:36:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-22 14:36:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 445. [2021-11-22 14:36:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.614864864864865) internal successors, (717), 444 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 717 transitions. [2021-11-22 14:36:24,557 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 717 transitions. Word has length 144 [2021-11-22 14:36:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:24,561 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 717 transitions. [2021-11-22 14:36:24,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 717 transitions. [2021-11-22 14:36:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-22 14:36:24,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:24,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:24,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:36:24,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash -235311730, now seen corresponding path program 1 times [2021-11-22 14:36:24,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:24,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494744870] [2021-11-22 14:36:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:24,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:24,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494744870] [2021-11-22 14:36:24,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494744870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:24,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:24,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:24,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463514896] [2021-11-22 14:36:24,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:24,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:24,748 INFO L87 Difference]: Start difference. First operand 445 states and 717 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:25,883 INFO L93 Difference]: Finished difference Result 1324 states and 2138 transitions. [2021-11-22 14:36:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:25,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-22 14:36:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:25,891 INFO L225 Difference]: With dead ends: 1324 [2021-11-22 14:36:25,892 INFO L226 Difference]: Without dead ends: 881 [2021-11-22 14:36:25,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:25,896 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:25,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 125 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 14:36:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-11-22 14:36:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 877. [2021-11-22 14:36:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.595890410958904) internal successors, (1398), 876 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1398 transitions. [2021-11-22 14:36:25,981 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1398 transitions. Word has length 150 [2021-11-22 14:36:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:25,982 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1398 transitions. [2021-11-22 14:36:25,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1398 transitions. [2021-11-22 14:36:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-22 14:36:25,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:25,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:25,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:36:25,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1640240486, now seen corresponding path program 1 times [2021-11-22 14:36:25,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:25,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964391154] [2021-11-22 14:36:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:25,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:26,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:26,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964391154] [2021-11-22 14:36:26,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964391154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:26,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:26,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:26,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26672057] [2021-11-22 14:36:26,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:26,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:26,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:26,106 INFO L87 Difference]: Start difference. First operand 877 states and 1398 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:27,240 INFO L93 Difference]: Finished difference Result 2565 states and 4101 transitions. [2021-11-22 14:36:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:27,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-22 14:36:27,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:27,254 INFO L225 Difference]: With dead ends: 2565 [2021-11-22 14:36:27,254 INFO L226 Difference]: Without dead ends: 1690 [2021-11-22 14:36:27,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:27,259 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:27,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 14:36:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-11-22 14:36:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2021-11-22 14:36:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.3860272350503255) internal successors, (2341), 1689 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2341 transitions. [2021-11-22 14:36:27,324 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2341 transitions. Word has length 150 [2021-11-22 14:36:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:27,325 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2341 transitions. [2021-11-22 14:36:27,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2341 transitions. [2021-11-22 14:36:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-22 14:36:27,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:27,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:27,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:36:27,332 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1267325975, now seen corresponding path program 1 times [2021-11-22 14:36:27,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502271348] [2021-11-22 14:36:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:27,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:27,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:27,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502271348] [2021-11-22 14:36:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502271348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:27,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:27,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:27,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149776101] [2021-11-22 14:36:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:27,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:27,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:27,417 INFO L87 Difference]: Start difference. First operand 1690 states and 2341 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:28,589 INFO L93 Difference]: Finished difference Result 5048 states and 6998 transitions. [2021-11-22 14:36:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-22 14:36:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:28,618 INFO L225 Difference]: With dead ends: 5048 [2021-11-22 14:36:28,618 INFO L226 Difference]: Without dead ends: 3360 [2021-11-22 14:36:28,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:28,635 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:28,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 206 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 14:36:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-11-22 14:36:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3351. [2021-11-22 14:36:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 3350 states have (on average 1.3722388059701494) internal successors, (4597), 3350 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4597 transitions. [2021-11-22 14:36:28,752 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4597 transitions. Word has length 156 [2021-11-22 14:36:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:28,753 INFO L470 AbstractCegarLoop]: Abstraction has 3351 states and 4597 transitions. [2021-11-22 14:36:28,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4597 transitions. [2021-11-22 14:36:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-22 14:36:28,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:28,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:28,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:36:28,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:28,768 INFO L85 PathProgramCache]: Analyzing trace with hash -267079187, now seen corresponding path program 1 times [2021-11-22 14:36:28,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972293227] [2021-11-22 14:36:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:28,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:36:28,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:28,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972293227] [2021-11-22 14:36:28,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972293227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:28,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:28,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961379009] [2021-11-22 14:36:28,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:28,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:28,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:28,880 INFO L87 Difference]: Start difference. First operand 3351 states and 4597 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:30,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:30,112 INFO L93 Difference]: Finished difference Result 9992 states and 13723 transitions. [2021-11-22 14:36:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-22 14:36:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:30,157 INFO L225 Difference]: With dead ends: 9992 [2021-11-22 14:36:30,158 INFO L226 Difference]: Without dead ends: 6643 [2021-11-22 14:36:30,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:30,164 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:30,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 14:36:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2021-11-22 14:36:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6605. [2021-11-22 14:36:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6605 states, 6604 states have (on average 1.3452453058752272) internal successors, (8884), 6604 states have internal predecessors, (8884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 8884 transitions. [2021-11-22 14:36:30,376 INFO L78 Accepts]: Start accepts. Automaton has 6605 states and 8884 transitions. Word has length 158 [2021-11-22 14:36:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:30,377 INFO L470 AbstractCegarLoop]: Abstraction has 6605 states and 8884 transitions. [2021-11-22 14:36:30,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6605 states and 8884 transitions. [2021-11-22 14:36:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-22 14:36:30,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:30,392 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:30,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:36:30,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1504485225, now seen corresponding path program 1 times [2021-11-22 14:36:30,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:30,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228823119] [2021-11-22 14:36:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:30,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 14:36:30,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:30,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228823119] [2021-11-22 14:36:30,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228823119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:30,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:30,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:36:30,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49484012] [2021-11-22 14:36:30,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:30,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:30,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:30,495 INFO L87 Difference]: Start difference. First operand 6605 states and 8884 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:31,800 INFO L93 Difference]: Finished difference Result 17695 states and 24239 transitions. [2021-11-22 14:36:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-22 14:36:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:31,878 INFO L225 Difference]: With dead ends: 17695 [2021-11-22 14:36:31,878 INFO L226 Difference]: Without dead ends: 11092 [2021-11-22 14:36:31,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:31,891 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:31,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 364 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 14:36:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2021-11-22 14:36:32,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 11082. [2021-11-22 14:36:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 1.2974460788737479) internal successors, (14377), 11081 states have internal predecessors, (14377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 14377 transitions. [2021-11-22 14:36:32,351 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 14377 transitions. Word has length 172 [2021-11-22 14:36:32,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:32,354 INFO L470 AbstractCegarLoop]: Abstraction has 11082 states and 14377 transitions. [2021-11-22 14:36:32,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 14377 transitions. [2021-11-22 14:36:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-22 14:36:32,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:32,380 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:32,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:36:32,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2111621614, now seen corresponding path program 1 times [2021-11-22 14:36:32,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:32,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750469789] [2021-11-22 14:36:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:32,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:32,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750469789] [2021-11-22 14:36:32,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750469789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:36:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071707521] [2021-11-22 14:36:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:32,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:36:32,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:36:32,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:36:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:36:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:36:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:36:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:36:33,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:36:33,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071707521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:33,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:36:33,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-22 14:36:33,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537541282] [2021-11-22 14:36:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:33,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:36:33,274 INFO L87 Difference]: Start difference. First operand 11082 states and 14377 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:34,704 INFO L93 Difference]: Finished difference Result 31946 states and 41599 transitions. [2021-11-22 14:36:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-22 14:36:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:34,798 INFO L225 Difference]: With dead ends: 31946 [2021-11-22 14:36:34,799 INFO L226 Difference]: Without dead ends: 20866 [2021-11-22 14:36:34,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:36:34,822 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 230 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:34,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 206 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 14:36:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20866 states. [2021-11-22 14:36:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20866 to 20862. [2021-11-22 14:36:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20862 states, 20861 states have (on average 1.268012079957816) internal successors, (26452), 20861 states have internal predecessors, (26452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20862 states to 20862 states and 26452 transitions. [2021-11-22 14:36:35,615 INFO L78 Accepts]: Start accepts. Automaton has 20862 states and 26452 transitions. Word has length 181 [2021-11-22 14:36:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:35,616 INFO L470 AbstractCegarLoop]: Abstraction has 20862 states and 26452 transitions. [2021-11-22 14:36:35,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 20862 states and 26452 transitions. [2021-11-22 14:36:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-22 14:36:35,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:35,649 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:35,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:36:35,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:36:35,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1871477101, now seen corresponding path program 1 times [2021-11-22 14:36:35,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850421758] [2021-11-22 14:36:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:35,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:36:36,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850421758] [2021-11-22 14:36:36,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850421758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:36,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:36,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:36:36,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875393494] [2021-11-22 14:36:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:36,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:36,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:36,066 INFO L87 Difference]: Start difference. First operand 20862 states and 26452 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:37,522 INFO L93 Difference]: Finished difference Result 48864 states and 62100 transitions. [2021-11-22 14:36:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-22 14:36:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:37,593 INFO L225 Difference]: With dead ends: 48864 [2021-11-22 14:36:37,593 INFO L226 Difference]: Without dead ends: 28004 [2021-11-22 14:36:37,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:37,623 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:37,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 361 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 14:36:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28004 states. [2021-11-22 14:36:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28004 to 27969. [2021-11-22 14:36:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27969 states, 27968 states have (on average 1.2254362128146452) internal successors, (34273), 27968 states have internal predecessors, (34273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27969 states to 27969 states and 34273 transitions. [2021-11-22 14:36:38,638 INFO L78 Accepts]: Start accepts. Automaton has 27969 states and 34273 transitions. Word has length 185 [2021-11-22 14:36:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:38,639 INFO L470 AbstractCegarLoop]: Abstraction has 27969 states and 34273 transitions. [2021-11-22 14:36:38,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 27969 states and 34273 transitions. [2021-11-22 14:36:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-22 14:36:38,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:38,685 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:38,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:36:38,686 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:38,687 INFO L85 PathProgramCache]: Analyzing trace with hash 564235399, now seen corresponding path program 1 times [2021-11-22 14:36:38,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:38,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398784642] [2021-11-22 14:36:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:38,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:36:38,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:38,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398784642] [2021-11-22 14:36:38,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398784642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:38,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:38,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:36:38,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558601521] [2021-11-22 14:36:38,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:38,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:36:38,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:36:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:36:38,829 INFO L87 Difference]: Start difference. First operand 27969 states and 34273 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:40,392 INFO L93 Difference]: Finished difference Result 50148 states and 61194 transitions. [2021-11-22 14:36:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:36:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-22 14:36:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:40,449 INFO L225 Difference]: With dead ends: 50148 [2021-11-22 14:36:40,449 INFO L226 Difference]: Without dead ends: 22384 [2021-11-22 14:36:40,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:36:40,484 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 460 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:40,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 54 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 14:36:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22384 states. [2021-11-22 14:36:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22384 to 22384. [2021-11-22 14:36:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22384 states, 22383 states have (on average 1.1557878747263548) internal successors, (25870), 22383 states have internal predecessors, (25870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 25870 transitions. [2021-11-22 14:36:41,301 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 25870 transitions. Word has length 200 [2021-11-22 14:36:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:41,302 INFO L470 AbstractCegarLoop]: Abstraction has 22384 states and 25870 transitions. [2021-11-22 14:36:41,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 25870 transitions. [2021-11-22 14:36:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-22 14:36:41,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:41,343 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:41,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:36:41,343 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1419350507, now seen corresponding path program 1 times [2021-11-22 14:36:41,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:41,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50445092] [2021-11-22 14:36:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:41,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-22 14:36:41,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:41,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50445092] [2021-11-22 14:36:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50445092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:41,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:41,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:41,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644455396] [2021-11-22 14:36:41,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:41,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:41,488 INFO L87 Difference]: Start difference. First operand 22384 states and 25870 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:42,994 INFO L93 Difference]: Finished difference Result 55756 states and 64725 transitions. [2021-11-22 14:36:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-22 14:36:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:43,199 INFO L225 Difference]: With dead ends: 55756 [2021-11-22 14:36:43,200 INFO L226 Difference]: Without dead ends: 33577 [2021-11-22 14:36:43,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:43,237 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:43,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 100 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 14:36:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33577 states. [2021-11-22 14:36:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33577 to 32956. [2021-11-22 14:36:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32956 states, 32955 states have (on average 1.1514489455317858) internal successors, (37946), 32955 states have internal predecessors, (37946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32956 states to 32956 states and 37946 transitions. [2021-11-22 14:36:44,049 INFO L78 Accepts]: Start accepts. Automaton has 32956 states and 37946 transitions. Word has length 213 [2021-11-22 14:36:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:44,050 INFO L470 AbstractCegarLoop]: Abstraction has 32956 states and 37946 transitions. [2021-11-22 14:36:44,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32956 states and 37946 transitions. [2021-11-22 14:36:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-22 14:36:44,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:44,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:44,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 14:36:44,120 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1457404762, now seen corresponding path program 1 times [2021-11-22 14:36:44,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:44,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433998509] [2021-11-22 14:36:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:44,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-22 14:36:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433998509] [2021-11-22 14:36:44,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433998509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:44,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:44,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:36:44,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105182685] [2021-11-22 14:36:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:44,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:36:44,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:44,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:36:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:36:44,490 INFO L87 Difference]: Start difference. First operand 32956 states and 37946 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:46,568 INFO L93 Difference]: Finished difference Result 95627 states and 110910 transitions. [2021-11-22 14:36:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:36:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2021-11-22 14:36:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:46,718 INFO L225 Difference]: With dead ends: 95627 [2021-11-22 14:36:46,719 INFO L226 Difference]: Without dead ends: 63079 [2021-11-22 14:36:46,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:36:46,752 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 471 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:46,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 472 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-22 14:36:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63079 states. [2021-11-22 14:36:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63079 to 50459. [2021-11-22 14:36:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50459 states, 50458 states have (on average 1.1502041301676642) internal successors, (58037), 50458 states have internal predecessors, (58037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50459 states to 50459 states and 58037 transitions. [2021-11-22 14:36:48,257 INFO L78 Accepts]: Start accepts. Automaton has 50459 states and 58037 transitions. Word has length 230 [2021-11-22 14:36:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:48,258 INFO L470 AbstractCegarLoop]: Abstraction has 50459 states and 58037 transitions. [2021-11-22 14:36:48,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 50459 states and 58037 transitions. [2021-11-22 14:36:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-22 14:36:48,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:48,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:48,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:36:48,306 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2026881340, now seen corresponding path program 1 times [2021-11-22 14:36:48,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:48,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104021752] [2021-11-22 14:36:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:48,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-22 14:36:48,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104021752] [2021-11-22 14:36:48,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104021752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:48,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:48,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:48,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080440222] [2021-11-22 14:36:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:48,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:48,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:48,483 INFO L87 Difference]: Start difference. First operand 50459 states and 58037 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:50,480 INFO L93 Difference]: Finished difference Result 134481 states and 155084 transitions. [2021-11-22 14:36:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2021-11-22 14:36:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:50,611 INFO L225 Difference]: With dead ends: 134481 [2021-11-22 14:36:50,611 INFO L226 Difference]: Without dead ends: 84227 [2021-11-22 14:36:50,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:50,648 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:50,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 122 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 14:36:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84227 states. [2021-11-22 14:36:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84227 to 84220. [2021-11-22 14:36:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84220 states, 84219 states have (on average 1.1496811883304243) internal successors, (96825), 84219 states have internal predecessors, (96825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84220 states to 84220 states and 96825 transitions. [2021-11-22 14:36:52,403 INFO L78 Accepts]: Start accepts. Automaton has 84220 states and 96825 transitions. Word has length 295 [2021-11-22 14:36:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:52,404 INFO L470 AbstractCegarLoop]: Abstraction has 84220 states and 96825 transitions. [2021-11-22 14:36:52,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 84220 states and 96825 transitions. [2021-11-22 14:36:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-22 14:36:52,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:52,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:52,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:36:52,478 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash -679322528, now seen corresponding path program 1 times [2021-11-22 14:36:52,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:52,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349164596] [2021-11-22 14:36:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:52,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-22 14:36:52,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349164596] [2021-11-22 14:36:52,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349164596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:52,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:52,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:36:52,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514850129] [2021-11-22 14:36:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:52,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:52,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:52,665 INFO L87 Difference]: Start difference. First operand 84220 states and 96825 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:54,669 INFO L93 Difference]: Finished difference Result 189401 states and 218167 transitions. [2021-11-22 14:36:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2021-11-22 14:36:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:54,823 INFO L225 Difference]: With dead ends: 189401 [2021-11-22 14:36:54,823 INFO L226 Difference]: Without dead ends: 105386 [2021-11-22 14:36:54,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:54,883 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 157 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:54,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 141 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 14:36:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105386 states. [2021-11-22 14:36:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105386 to 105384. [2021-11-22 14:36:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105384 states, 105383 states have (on average 1.1522826262300372) internal successors, (121431), 105383 states have internal predecessors, (121431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105384 states to 105384 states and 121431 transitions. [2021-11-22 14:36:57,161 INFO L78 Accepts]: Start accepts. Automaton has 105384 states and 121431 transitions. Word has length 319 [2021-11-22 14:36:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:57,161 INFO L470 AbstractCegarLoop]: Abstraction has 105384 states and 121431 transitions. [2021-11-22 14:36:57,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 105384 states and 121431 transitions. [2021-11-22 14:36:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-22 14:36:57,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:57,279 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 14:36:57,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:36:57,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash 901370999, now seen corresponding path program 1 times [2021-11-22 14:36:57,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:36:57,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796336106] [2021-11-22 14:36:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:36:57,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:36:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:36:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-22 14:36:57,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:36:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796336106] [2021-11-22 14:36:57,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796336106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:36:57,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:36:57,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:36:57,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992585318] [2021-11-22 14:36:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:36:57,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:36:57,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:36:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:36:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:57,473 INFO L87 Difference]: Start difference. First operand 105384 states and 121431 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:59,367 INFO L93 Difference]: Finished difference Result 196707 states and 226115 transitions. [2021-11-22 14:36:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:36:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-11-22 14:36:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:59,520 INFO L225 Difference]: With dead ends: 196707 [2021-11-22 14:36:59,520 INFO L226 Difference]: Without dead ends: 112692 [2021-11-22 14:36:59,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:36:59,564 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 163 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:59,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 357 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 14:36:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112692 states. [2021-11-22 14:37:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112692 to 111880. [2021-11-22 14:37:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111880 states, 111879 states have (on average 1.1415010859946908) internal successors, (127710), 111879 states have internal predecessors, (127710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111880 states to 111880 states and 127710 transitions. [2021-11-22 14:37:02,230 INFO L78 Accepts]: Start accepts. Automaton has 111880 states and 127710 transitions. Word has length 323 [2021-11-22 14:37:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:02,230 INFO L470 AbstractCegarLoop]: Abstraction has 111880 states and 127710 transitions. [2021-11-22 14:37:02,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 111880 states and 127710 transitions. [2021-11-22 14:37:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-22 14:37:02,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:02,290 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 14:37:02,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 14:37:02,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1063126104, now seen corresponding path program 1 times [2021-11-22 14:37:02,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:37:02,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776694644] [2021-11-22 14:37:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:02,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:37:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-22 14:37:02,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:37:02,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776694644] [2021-11-22 14:37:02,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776694644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:37:02,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:37:02,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:37:02,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28010189] [2021-11-22 14:37:02,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:37:02,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:37:02,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:37:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:37:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:37:02,427 INFO L87 Difference]: Start difference. First operand 111880 states and 127710 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:37:04,604 INFO L93 Difference]: Finished difference Result 228832 states and 260859 transitions. [2021-11-22 14:37:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:37:04,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-11-22 14:37:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:37:04,778 INFO L225 Difference]: With dead ends: 228832 [2021-11-22 14:37:04,778 INFO L226 Difference]: Without dead ends: 138321 [2021-11-22 14:37:04,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:37:04,816 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:37:04,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 134 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:37:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138321 states. [2021-11-22 14:37:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138321 to 138316. [2021-11-22 14:37:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138316 states, 138315 states have (on average 1.1416043090048078) internal successors, (157901), 138315 states have internal predecessors, (157901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138316 states to 138316 states and 157901 transitions. [2021-11-22 14:37:07,682 INFO L78 Accepts]: Start accepts. Automaton has 138316 states and 157901 transitions. Word has length 330 [2021-11-22 14:37:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:07,682 INFO L470 AbstractCegarLoop]: Abstraction has 138316 states and 157901 transitions. [2021-11-22 14:37:07,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 138316 states and 157901 transitions. [2021-11-22 14:37:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-22 14:37:07,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:07,767 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:37:07,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:37:07,767 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 178796709, now seen corresponding path program 1 times [2021-11-22 14:37:07,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:37:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672015683] [2021-11-22 14:37:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:07,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:37:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:37:07,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:37:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672015683] [2021-11-22 14:37:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672015683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:37:07,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:37:07,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:37:07,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541106818] [2021-11-22 14:37:07,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:37:07,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:37:07,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:37:07,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:37:07,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:37:07,966 INFO L87 Difference]: Start difference. First operand 138316 states and 157901 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:37:10,821 INFO L93 Difference]: Finished difference Result 228942 states and 261013 transitions. [2021-11-22 14:37:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:37:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-11-22 14:37:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:37:11,077 INFO L225 Difference]: With dead ends: 228942 [2021-11-22 14:37:11,077 INFO L226 Difference]: Without dead ends: 138431 [2021-11-22 14:37:11,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:37:11,128 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 381 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:37:11,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 78 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 14:37:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138431 states. [2021-11-22 14:37:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138431 to 136895. [2021-11-22 14:37:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136895 states, 136894 states have (on average 1.1424678948675617) internal successors, (156397), 136894 states have internal predecessors, (156397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136895 states to 136895 states and 156397 transitions. [2021-11-22 14:37:13,393 INFO L78 Accepts]: Start accepts. Automaton has 136895 states and 156397 transitions. Word has length 338 [2021-11-22 14:37:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:13,394 INFO L470 AbstractCegarLoop]: Abstraction has 136895 states and 156397 transitions. [2021-11-22 14:37:13,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 136895 states and 156397 transitions. [2021-11-22 14:37:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-22 14:37:13,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:13,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:37:13,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 14:37:13,462 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1666657648, now seen corresponding path program 1 times [2021-11-22 14:37:13,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:37:13,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436621735] [2021-11-22 14:37:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:13,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:37:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-22 14:37:13,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:37:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436621735] [2021-11-22 14:37:13,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436621735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:37:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320133370] [2021-11-22 14:37:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:13,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:37:13,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:37:13,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:37:13,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:37:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:37:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:37:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-22 14:37:15,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:37:15,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320133370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:37:15,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:37:15,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-22 14:37:15,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550379907] [2021-11-22 14:37:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:37:15,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:37:15,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:37:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:37:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:37:15,347 INFO L87 Difference]: Start difference. First operand 136895 states and 156397 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:37:17,103 INFO L93 Difference]: Finished difference Result 297131 states and 339473 transitions. [2021-11-22 14:37:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:37:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-11-22 14:37:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:37:17,338 INFO L225 Difference]: With dead ends: 297131 [2021-11-22 14:37:17,338 INFO L226 Difference]: Without dead ends: 160441 [2021-11-22 14:37:17,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:37:17,407 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 238 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:37:17,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 128 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:37:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160441 states. [2021-11-22 14:37:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160441 to 159827. [2021-11-22 14:37:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159827 states, 159826 states have (on average 1.1344336966451016) internal successors, (181312), 159826 states have internal predecessors, (181312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159827 states to 159827 states and 181312 transitions. [2021-11-22 14:37:21,130 INFO L78 Accepts]: Start accepts. Automaton has 159827 states and 181312 transitions. Word has length 345 [2021-11-22 14:37:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:21,130 INFO L470 AbstractCegarLoop]: Abstraction has 159827 states and 181312 transitions. [2021-11-22 14:37:21,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 159827 states and 181312 transitions. [2021-11-22 14:37:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-22 14:37:21,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:21,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:37:21,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 14:37:21,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dbcc0a2-78fd-4d3e-9321-0ee4433acf69/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:37:21,404 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash -290618115, now seen corresponding path program 1 times [2021-11-22 14:37:21,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:37:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343157097] [2021-11-22 14:37:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:21,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:37:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-22 14:37:21,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:37:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343157097] [2021-11-22 14:37:21,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343157097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:37:21,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:37:21,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:37:21,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504175248] [2021-11-22 14:37:21,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:37:21,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:37:21,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:37:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:37:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:37:21,576 INFO L87 Difference]: Start difference. First operand 159827 states and 181312 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:37:24,757 INFO L93 Difference]: Finished difference Result 348829 states and 396351 transitions. [2021-11-22 14:37:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:37:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 349 [2021-11-22 14:37:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:37:25,012 INFO L225 Difference]: With dead ends: 348829 [2021-11-22 14:37:25,012 INFO L226 Difference]: Without dead ends: 189207 [2021-11-22 14:37:25,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:37:25,094 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 370 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:37:25,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 92 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-22 14:37:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189207 states. [2021-11-22 14:37:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189207 to 176320. [2021-11-22 14:37:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176320 states, 176319 states have (on average 1.134455163652244) internal successors, (200026), 176319 states have internal predecessors, (200026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176320 states to 176320 states and 200026 transitions. [2021-11-22 14:37:29,291 INFO L78 Accepts]: Start accepts. Automaton has 176320 states and 200026 transitions. Word has length 349 [2021-11-22 14:37:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:29,291 INFO L470 AbstractCegarLoop]: Abstraction has 176320 states and 200026 transitions. [2021-11-22 14:37:29,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 176320 states and 200026 transitions. [2021-11-22 14:37:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-22 14:37:29,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:29,397 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:37:29,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 14:37:29,397 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:29,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:29,398 INFO L85 PathProgramCache]: Analyzing trace with hash 930329166, now seen corresponding path program 1 times [2021-11-22 14:37:29,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:37:29,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069346475] [2021-11-22 14:37:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:29,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms