./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:41:14,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:41:14,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:41:14,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:41:14,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:41:14,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:41:14,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:41:14,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:41:14,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:41:14,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:41:14,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:41:14,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:41:14,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:41:14,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:41:14,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:41:14,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:41:14,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:41:14,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:41:14,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:41:14,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:41:14,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:41:14,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:41:14,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:41:14,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:41:14,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:41:14,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:41:14,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:41:14,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:41:14,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:41:14,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:41:14,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:41:14,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:41:14,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:41:14,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:41:14,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:41:14,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:41:14,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:41:14,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:41:14,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:41:14,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:41:14,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:41:14,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:41:14,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:41:14,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:41:14,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:41:14,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:41:14,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:41:14,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:41:14,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:41:14,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:41:14,563 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:41:14,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:41:14,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:41:14,564 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:41:14,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:41:14,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:41:14,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:41:14,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:41:14,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:41:14,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:41:14,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:41:14,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:41:14,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:41:14,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:41:14,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:41:14,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:41:14,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:41:14,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:41:14,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:41:14,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:41:14,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:41:14,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:41:14,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:41:14,568 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_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2021-11-20 06:41:14,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:41:14,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:41:14,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:41:14,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:41:14,833 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:41:14,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-11-20 06:41:14,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/data/8b7695bd0/28899da9a69b4f1fa42e3fa88fee5089/FLAG2a135dcc7 [2021-11-20 06:41:15,523 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:41:15,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-11-20 06:41:15,540 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/data/8b7695bd0/28899da9a69b4f1fa42e3fa88fee5089/FLAG2a135dcc7 [2021-11-20 06:41:15,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/data/8b7695bd0/28899da9a69b4f1fa42e3fa88fee5089 [2021-11-20 06:41:15,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:41:15,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:41:15,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:41:15,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:41:15,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:41:15,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:41:15" (1/1) ... [2021-11-20 06:41:15,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83d17be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:15, skipping insertion in model container [2021-11-20 06:41:15,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:41:15" (1/1) ... [2021-11-20 06:41:15,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:41:15,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:41:16,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:41:16,283 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:41:16,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:41:16,357 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:41:16,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16 WrapperNode [2021-11-20 06:41:16,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:41:16,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:41:16,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:41:16,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:41:16,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,418 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-11-20 06:41:16,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:41:16,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:41:16,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:41:16,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:41:16,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:41:16,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:41:16,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:41:16,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:41:16,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (1/1) ... [2021-11-20 06:41:16,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:41:16,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:16,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:41:16,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:41:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:41:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:41:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:41:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:41:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:41:16,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:41:16,611 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:41:16,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:41:16,913 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:41:16,922 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:41:16,923 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:41:16,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:41:16 BoogieIcfgContainer [2021-11-20 06:41:16,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:41:16,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:41:16,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:41:16,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:41:16,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:41:15" (1/3) ... [2021-11-20 06:41:16,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2197b241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:41:16, skipping insertion in model container [2021-11-20 06:41:16,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:16" (2/3) ... [2021-11-20 06:41:16,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2197b241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:41:16, skipping insertion in model container [2021-11-20 06:41:16,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:41:16" (3/3) ... [2021-11-20 06:41:16,942 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2021-11-20 06:41:16,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:41:16,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-20 06:41:16,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:41:17,002 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-20 06:41:17,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-20 06:41:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:41:17,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:17,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:17,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-20 06:41:17,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:17,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508638169] [2021-11-20 06:41:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:17,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:17,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508638169] [2021-11-20 06:41:17,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508638169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:17,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:17,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:41:17,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351982584] [2021-11-20 06:41:17,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:17,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:17,309 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:17,397 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-20 06:41:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:17,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 06:41:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:17,412 INFO L225 Difference]: With dead ends: 100 [2021-11-20 06:41:17,412 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 06:41:17,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:17,420 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:17,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 06:41:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-11-20 06:41:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-20 06:41:17,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-11-20 06:41:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:17,470 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-20 06:41:17,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-20 06:41:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:41:17,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:17,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:17,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:41:17,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-20 06:41:17,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:17,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273680999] [2021-11-20 06:41:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:17,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:17,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:17,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273680999] [2021-11-20 06:41:17,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273680999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:17,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:17,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:41:17,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584137984] [2021-11-20 06:41:17,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:17,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:41:17,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:41:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:41:17,594 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:17,647 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-20 06:41:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:41:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 06:41:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:17,651 INFO L225 Difference]: With dead ends: 53 [2021-11-20 06:41:17,651 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 06:41:17,652 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 [2021-11-20 06:41:17,657 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:17,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 06:41:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 06:41:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-20 06:41:17,664 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-11-20 06:41:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:17,664 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-20 06:41:17,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-20 06:41:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:41:17,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:17,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:17,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:41:17,668 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-20 06:41:17,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:17,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540089482] [2021-11-20 06:41:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:17,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:17,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540089482] [2021-11-20 06:41:17,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540089482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:17,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:17,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:41:17,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567922125] [2021-11-20 06:41:17,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:17,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:17,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:17,764 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:17,908 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-11-20 06:41:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 06:41:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:17,910 INFO L225 Difference]: With dead ends: 97 [2021-11-20 06:41:17,912 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 06:41:17,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:41:17,914 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:17,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 06:41:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-11-20 06:41:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-20 06:41:17,927 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-11-20 06:41:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:17,927 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-20 06:41:17,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-20 06:41:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:41:17,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:17,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:17,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:41:17,929 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:17,930 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-20 06:41:17,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:17,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413613601] [2021-11-20 06:41:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:17,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:18,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413613601] [2021-11-20 06:41:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413613601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:18,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:18,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:41:18,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585098235] [2021-11-20 06:41:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:18,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:18,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:18,013 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:18,056 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-20 06:41:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:18,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-20 06:41:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:18,058 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:41:18,058 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 06:41:18,059 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 [2021-11-20 06:41:18,068 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:18,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 06:41:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-20 06:41:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-20 06:41:18,079 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-11-20 06:41:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:18,080 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-20 06:41:18,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-20 06:41:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:41:18,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:18,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:18,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:41:18,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-20 06:41:18,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774097803] [2021-11-20 06:41:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:18,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:18,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774097803] [2021-11-20 06:41:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774097803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:18,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:18,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:41:18,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125803472] [2021-11-20 06:41:18,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:18,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:18,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:18,164 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:18,201 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-20 06:41:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-20 06:41:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:18,207 INFO L225 Difference]: With dead ends: 98 [2021-11-20 06:41:18,207 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 06:41:18,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:18,208 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:18,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 06:41:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-11-20 06:41:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-20 06:41:18,226 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-11-20 06:41:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:18,226 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-20 06:41:18,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-20 06:41:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:41:18,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:18,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:18,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:41:18,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:18,229 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-20 06:41:18,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:18,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324099855] [2021-11-20 06:41:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:18,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:18,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324099855] [2021-11-20 06:41:18,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324099855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:18,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:18,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:41:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614659889] [2021-11-20 06:41:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:41:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:41:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:41:18,281 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:18,312 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-11-20 06:41:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:41:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-20 06:41:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:18,313 INFO L225 Difference]: With dead ends: 63 [2021-11-20 06:41:18,314 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 06:41:18,314 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 [2021-11-20 06:41:18,316 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:18,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 06:41:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-20 06:41:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-11-20 06:41:18,327 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-11-20 06:41:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:18,327 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-11-20 06:41:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-11-20 06:41:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:41:18,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:18,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:18,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:41:18,329 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-20 06:41:18,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:18,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789164932] [2021-11-20 06:41:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:18,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:18,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789164932] [2021-11-20 06:41:18,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789164932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:18,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:18,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:41:18,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329617986] [2021-11-20 06:41:18,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:18,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:41:18,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:41:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:41:18,442 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:18,532 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-11-20 06:41:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:41:18,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-20 06:41:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:18,533 INFO L225 Difference]: With dead ends: 98 [2021-11-20 06:41:18,533 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 06:41:18,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:41:18,535 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:18,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 06:41:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-11-20 06:41:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-11-20 06:41:18,551 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-11-20 06:41:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:18,551 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-11-20 06:41:18,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-11-20 06:41:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:41:18,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:18,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:18,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:41:18,552 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-20 06:41:18,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197812930] [2021-11-20 06:41:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:18,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:18,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:18,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197812930] [2021-11-20 06:41:18,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197812930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:18,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:18,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:41:18,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123872638] [2021-11-20 06:41:18,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:18,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:18,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:18,638 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:18,670 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-11-20 06:41:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:18,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-20 06:41:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:18,672 INFO L225 Difference]: With dead ends: 64 [2021-11-20 06:41:18,672 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 06:41:18,672 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 [2021-11-20 06:41:18,673 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:18,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 06:41:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-20 06:41:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-20 06:41:18,680 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-11-20 06:41:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:18,685 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-20 06:41:18,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-20 06:41:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:41:18,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:18,686 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:18,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:41:18,687 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-20 06:41:18,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505775087] [2021-11-20 06:41:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:18,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:18,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505775087] [2021-11-20 06:41:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505775087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441054846] [2021-11-20 06:41:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:18,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:18,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:18,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:41:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:41:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:18,990 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:41:18,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:41:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:41:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:19,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:19,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441054846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:19,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:19,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 06:41:19,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361475548] [2021-11-20 06:41:19,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:19,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:41:19,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:41:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:41:19,470 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:19,693 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-11-20 06:41:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:41:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 11 [2021-11-20 06:41:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:19,694 INFO L225 Difference]: With dead ends: 149 [2021-11-20 06:41:19,695 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 06:41:19,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:41:19,698 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 248 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:19,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:41:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 06:41:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-11-20 06:41:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-20 06:41:19,717 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-11-20 06:41:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:19,718 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-20 06:41:19,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-20 06:41:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:41:19,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:19,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:19,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:19,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:19,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2021-11-20 06:41:19,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:19,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154492449] [2021-11-20 06:41:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:19,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:19,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:19,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154492449] [2021-11-20 06:41:19,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154492449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:19,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:19,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:41:19,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059153357] [2021-11-20 06:41:19,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:19,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:19,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:19,951 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:19,986 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-20 06:41:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-20 06:41:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:19,987 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:41:19,987 INFO L226 Difference]: Without dead ends: 57 [2021-11-20 06:41:19,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:41:19,988 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:19,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-20 06:41:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-20 06:41:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-20 06:41:19,992 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2021-11-20 06:41:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:19,992 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-20 06:41:19,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-20 06:41:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:41:19,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:19,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:19,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:41:19,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-11-20 06:41:19,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:19,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086820799] [2021-11-20 06:41:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:19,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:20,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:20,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086820799] [2021-11-20 06:41:20,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086820799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:20,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:20,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:41:20,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22261607] [2021-11-20 06:41:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:41:20,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:41:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:41:20,051 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:20,129 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-20 06:41:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:41:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-20 06:41:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:20,131 INFO L225 Difference]: With dead ends: 80 [2021-11-20 06:41:20,131 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:41:20,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:41:20,132 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:20,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 65 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:41:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-11-20 06:41:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-20 06:41:20,136 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2021-11-20 06:41:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:20,136 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-20 06:41:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-20 06:41:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:41:20,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:20,137 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:41:20,138 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-20 06:41:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552314966] [2021-11-20 06:41:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:20,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:20,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552314966] [2021-11-20 06:41:20,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552314966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210083255] [2021-11-20 06:41:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:20,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:20,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:20,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:41:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:41:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:20,310 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:41:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:41:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:20,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210083255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:20,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:20,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 06:41:20,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685375085] [2021-11-20 06:41:20,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:20,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:41:20,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:41:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:20,673 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:20,863 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-11-20 06:41:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:41:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 13 [2021-11-20 06:41:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:20,864 INFO L225 Difference]: With dead ends: 124 [2021-11-20 06:41:20,865 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 06:41:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:41:20,865 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 175 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:20,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 221 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 06:41:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2021-11-20 06:41:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-20 06:41:20,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-11-20 06:41:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:20,868 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-20 06:41:20,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-20 06:41:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:41:20,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:20,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:20,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:21,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:21,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2021-11-20 06:41:21,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54496832] [2021-11-20 06:41:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:21,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:21,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54496832] [2021-11-20 06:41:21,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54496832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:21,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:21,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:41:21,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377354411] [2021-11-20 06:41:21,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:21,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:41:21,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:41:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:21,125 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:21,149 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-11-20 06:41:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:41:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:41:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:21,150 INFO L225 Difference]: With dead ends: 56 [2021-11-20 06:41:21,150 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 06:41:21,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:41:21,151 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:21,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 06:41:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 06:41:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-20 06:41:21,154 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2021-11-20 06:41:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:21,155 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-20 06:41:21,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-20 06:41:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:41:21,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:41:21,156 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2021-11-20 06:41:21,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248798016] [2021-11-20 06:41:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:21,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248798016] [2021-11-20 06:41:21,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248798016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:21,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:21,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:41:21,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752203467] [2021-11-20 06:41:21,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:21,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:41:21,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:41:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:41:21,190 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:21,233 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-20 06:41:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:41:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:41:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:21,235 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:41:21,235 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:41:21,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:41:21,236 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:21,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:41:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-20 06:41:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-20 06:41:21,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2021-11-20 06:41:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:21,239 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-20 06:41:21,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-20 06:41:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:41:21,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:21,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:41:21,241 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2021-11-20 06:41:21,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074329148] [2021-11-20 06:41:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:21,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074329148] [2021-11-20 06:41:21,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074329148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:21,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:21,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:41:21,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651179448] [2021-11-20 06:41:21,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:21,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:41:21,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:41:21,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:41:21,323 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:21,394 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-20 06:41:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:41:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:41:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:21,395 INFO L225 Difference]: With dead ends: 62 [2021-11-20 06:41:21,395 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 06:41:21,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:41:21,399 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:21,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 06:41:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-11-20 06:41:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-20 06:41:21,402 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2021-11-20 06:41:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:21,403 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-20 06:41:21,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-20 06:41:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:41:21,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,404 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] [2021-11-20 06:41:21,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:41:21,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2021-11-20 06:41:21,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417924517] [2021-11-20 06:41:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:21,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417924517] [2021-11-20 06:41:21,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417924517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:21,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:21,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:41:21,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676526722] [2021-11-20 06:41:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:21,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:41:21,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:41:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:41:21,444 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:21,451 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-20 06:41:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:41:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-20 06:41:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:21,452 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:41:21,452 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 06:41:21,452 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 [2021-11-20 06:41:21,453 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:21,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 06:41:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-20 06:41:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-20 06:41:21,458 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2021-11-20 06:41:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:21,459 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-20 06:41:21,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-20 06:41:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:41:21,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,460 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] [2021-11-20 06:41:21,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:41:21,461 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2021-11-20 06:41:21,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350153845] [2021-11-20 06:41:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:21,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:21,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350153845] [2021-11-20 06:41:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350153845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:21,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:21,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:41:21,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345806726] [2021-11-20 06:41:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:21,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:41:21,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:41:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:41:21,612 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:21,698 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-20 06:41:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:41:21,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-20 06:41:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:21,699 INFO L225 Difference]: With dead ends: 71 [2021-11-20 06:41:21,700 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 06:41:21,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:41:21,701 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:21,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 153 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 06:41:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-20 06:41:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-20 06:41:21,704 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2021-11-20 06:41:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-20 06:41:21,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-20 06:41:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:41:21,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,705 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] [2021-11-20 06:41:21,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:41:21,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2021-11-20 06:41:21,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303219157] [2021-11-20 06:41:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:21,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303219157] [2021-11-20 06:41:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303219157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:21,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:21,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:41:21,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689498175] [2021-11-20 06:41:21,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:41:21,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:41:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:41:21,860 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:21,960 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-20 06:41:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:41:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-20 06:41:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:21,961 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:41:21,962 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 06:41:21,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:21,962 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:21,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 134 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 06:41:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-20 06:41:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-11-20 06:41:21,965 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2021-11-20 06:41:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:21,965 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-11-20 06:41:21,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-11-20 06:41:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:41:21,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,970 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] [2021-11-20 06:41:21,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:41:21,971 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2021-11-20 06:41:21,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007400453] [2021-11-20 06:41:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:22,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:22,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007400453] [2021-11-20 06:41:22,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007400453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:22,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:22,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:41:22,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163892556] [2021-11-20 06:41:22,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:22,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:41:22,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:41:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:41:22,115 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:22,257 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-20 06:41:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:41:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-20 06:41:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:22,258 INFO L225 Difference]: With dead ends: 75 [2021-11-20 06:41:22,258 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 06:41:22,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:41:22,259 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:22,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 217 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 06:41:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-20 06:41:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-11-20 06:41:22,262 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2021-11-20 06:41:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:22,263 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-11-20 06:41:22,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-11-20 06:41:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:41:22,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:22,275 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] [2021-11-20 06:41:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:41:22,276 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2021-11-20 06:41:22,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:22,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331733024] [2021-11-20 06:41:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:22,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:22,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:22,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331733024] [2021-11-20 06:41:22,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331733024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:22,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:22,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:41:22,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230557057] [2021-11-20 06:41:22,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:22,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:41:22,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:41:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:22,422 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:22,628 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-11-20 06:41:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:41:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-20 06:41:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:22,629 INFO L225 Difference]: With dead ends: 96 [2021-11-20 06:41:22,629 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 06:41:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:41:22,630 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 152 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:22,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 195 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 06:41:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2021-11-20 06:41:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-11-20 06:41:22,634 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2021-11-20 06:41:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:22,634 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-11-20 06:41:22,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-11-20 06:41:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:41:22,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:22,635 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] [2021-11-20 06:41:22,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:41:22,635 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2021-11-20 06:41:22,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790303764] [2021-11-20 06:41:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:22,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:22,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:22,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790303764] [2021-11-20 06:41:22,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790303764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:22,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:22,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:41:22,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412119874] [2021-11-20 06:41:22,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:22,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:41:22,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:22,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:41:22,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:41:22,715 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:22,881 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-11-20 06:41:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:41:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-20 06:41:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:22,882 INFO L225 Difference]: With dead ends: 75 [2021-11-20 06:41:22,882 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 06:41:22,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:41:22,883 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:22,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 142 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 06:41:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-11-20 06:41:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-20 06:41:22,886 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2021-11-20 06:41:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:22,886 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-20 06:41:22,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-20 06:41:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:41:22,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:22,887 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] [2021-11-20 06:41:22,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:41:22,888 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2021-11-20 06:41:22,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:22,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436513145] [2021-11-20 06:41:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:22,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:23,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436513145] [2021-11-20 06:41:23,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436513145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425520688] [2021-11-20 06:41:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:23,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:23,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:23,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:41:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:41:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:23,103 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:41:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:41:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:23,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425520688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:23,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2021-11-20 06:41:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840625810] [2021-11-20 06:41:23,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:23,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:41:23,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:41:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:41:23,626 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:23,900 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-20 06:41:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:41:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 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 30 [2021-11-20 06:41:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:23,903 INFO L225 Difference]: With dead ends: 69 [2021-11-20 06:41:23,903 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:41:23,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:41:23,904 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 279 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:23,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 151 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:41:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-11-20 06:41:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-20 06:41:23,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2021-11-20 06:41:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:23,907 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-20 06:41:23,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-20 06:41:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:41:23,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:23,908 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] [2021-11-20 06:41:23,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:24,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:24,118 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2021-11-20 06:41:24,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:24,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131696243] [2021-11-20 06:41:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:24,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:24,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:24,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131696243] [2021-11-20 06:41:24,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131696243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:24,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522278292] [2021-11-20 06:41:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:24,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:24,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:24,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:24,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:41:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:41:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:24,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:24,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 06:41:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:24,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522278292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:24,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:24,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-20 06:41:24,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832969498] [2021-11-20 06:41:24,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:24,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:41:24,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:41:24,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:41:24,702 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:24,863 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-20 06:41:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:41:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 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 33 [2021-11-20 06:41:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:24,864 INFO L225 Difference]: With dead ends: 86 [2021-11-20 06:41:24,864 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 06:41:24,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:41:24,866 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:24,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 134 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 06:41:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2021-11-20 06:41:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-11-20 06:41:24,869 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2021-11-20 06:41:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:24,869 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-11-20 06:41:24,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-11-20 06:41:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:41:24,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:24,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:24,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:25,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:25,086 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2021-11-20 06:41:25,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:25,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370091531] [2021-11-20 06:41:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:25,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:25,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370091531] [2021-11-20 06:41:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370091531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384515009] [2021-11-20 06:41:25,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:41:25,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:25,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:25,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:41:25,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:41:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:41:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:25,415 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:41:25,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:41:25,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:41:25,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:25,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-20 06:41:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:41:25,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:26,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-20 06:41:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-20 06:41:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:41:26,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384515009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:26,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:26,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-20 06:41:26,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612306182] [2021-11-20 06:41:26,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:26,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:41:26,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:26,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:41:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:41:26,904 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:28,520 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2021-11-20 06:41:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:41:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 0 states have call successors, (0), 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 36 [2021-11-20 06:41:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:28,522 INFO L225 Difference]: With dead ends: 157 [2021-11-20 06:41:28,522 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 06:41:28,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=702, Invalid=3204, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:41:28,524 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:28,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 407 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 586 Invalid, 0 Unknown, 119 Unchecked, 0.4s Time] [2021-11-20 06:41:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 06:41:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2021-11-20 06:41:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 117 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2021-11-20 06:41:28,528 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 36 [2021-11-20 06:41:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:28,528 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2021-11-20 06:41:28,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2021-11-20 06:41:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:41:28,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:28,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:28,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:28,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:41:28,730 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2021-11-20 06:41:28,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:28,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174437840] [2021-11-20 06:41:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:28,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:29,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174437840] [2021-11-20 06:41:29,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174437840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:29,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521692812] [2021-11-20 06:41:29,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:41:29,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:29,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:29,048 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:29,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:41:29,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:41:29,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 06:41:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:41:29,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:41:29,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 06:41:31,199 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-11-20 06:41:31,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 37 [2021-11-20 06:41:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:31,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:34,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:34,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 124 [2021-11-20 06:41:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 06:41:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:41:34,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:34,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 171 treesize of output 161 [2021-11-20 06:41:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521692812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:34,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:34,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 19] total 45 [2021-11-20 06:41:34,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559019756] [2021-11-20 06:41:34,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 06:41:34,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 06:41:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:41:34,783 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:35,699 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2021-11-20 06:41:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:41:35,699 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 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 46 [2021-11-20 06:41:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:35,700 INFO L225 Difference]: With dead ends: 171 [2021-11-20 06:41:35,700 INFO L226 Difference]: Without dead ends: 148 [2021-11-20 06:41:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=327, Invalid=3213, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 06:41:35,703 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:35,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 357 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 203 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-20 06:41:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-20 06:41:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2021-11-20 06:41:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 144 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-11-20 06:41:35,707 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 46 [2021-11-20 06:41:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:35,708 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-11-20 06:41:35,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-11-20 06:41:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:41:35,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:35,709 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:41:35,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:35,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:41:35,926 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2021-11-20 06:41:35,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:35,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837639046] [2021-11-20 06:41:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:35,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:36,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837639046] [2021-11-20 06:41:36,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837639046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127671682] [2021-11-20 06:41:36,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:41:36,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:36,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:36,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:41:36,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:41:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:41:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 06:41:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:36,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127671682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:36,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:36,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2021-11-20 06:41:36,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161963217] [2021-11-20 06:41:36,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:36,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:41:36,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:41:36,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:41:36,669 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:36,984 INFO L93 Difference]: Finished difference Result 280 states and 304 transitions. [2021-11-20 06:41:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:41:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 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 50 [2021-11-20 06:41:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:36,986 INFO L225 Difference]: With dead ends: 280 [2021-11-20 06:41:36,987 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:41:36,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:41:36,987 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 346 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:36,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 328 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:41:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:41:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 197. [2021-11-20 06:41:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.1025641025641026) internal successors, (215), 196 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 215 transitions. [2021-11-20 06:41:36,996 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 215 transitions. Word has length 50 [2021-11-20 06:41:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:36,996 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 215 transitions. [2021-11-20 06:41:36,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 215 transitions. [2021-11-20 06:41:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:41:36,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:36,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:37,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:37,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:41:37,214 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -847276983, now seen corresponding path program 1 times [2021-11-20 06:41:37,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69234777] [2021-11-20 06:41:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:37,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:41:37,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69234777] [2021-11-20 06:41:37,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69234777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:37,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628608517] [2021-11-20 06:41:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:37,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:37,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:37,465 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:37,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:41:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-20 06:41:37,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:37,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:41:37,885 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:41:37,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 06:41:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:41:40,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:43,577 INFO L354 Elim1Store]: treesize reduction 57, result has 38.0 percent of original size [2021-11-20 06:41:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1275 treesize of output 997 [2021-11-20 06:41:43,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 891 treesize of output 843 [2021-11-20 06:41:43,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:41:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:41:43,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:43,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 138 [2021-11-20 06:41:43,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:41:43,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:41:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:41:43,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:43,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 968 treesize of output 956 [2021-11-20 06:41:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:41:57,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628608517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:57,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:57,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23, 26] total 55 [2021-11-20 06:41:57,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930495440] [2021-11-20 06:41:57,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 06:41:57,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 06:41:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2608, Unknown=1, NotChecked=0, Total=2970 [2021-11-20 06:41:57,196 INFO L87 Difference]: Start difference. First operand 197 states and 215 transitions. Second operand has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:57,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:57,768 INFO L93 Difference]: Finished difference Result 222 states and 240 transitions. [2021-11-20 06:41:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:41:57,769 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 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 56 [2021-11-20 06:41:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:57,770 INFO L225 Difference]: With dead ends: 222 [2021-11-20 06:41:57,770 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 06:41:57,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=438, Invalid=3343, Unknown=1, NotChecked=0, Total=3782 [2021-11-20 06:41:57,772 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:57,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 437 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 347 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-11-20 06:41:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 06:41:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-11-20 06:41:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.1046511627906976) internal successors, (190), 173 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2021-11-20 06:41:57,781 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 56 [2021-11-20 06:41:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:57,781 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2021-11-20 06:41:57,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2021-11-20 06:41:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:41:57,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:57,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:57,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:57,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:57,998 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:41:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2021-11-20 06:41:57,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:57,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206705635] [2021-11-20 06:41:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:57,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:58,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206705635] [2021-11-20 06:41:58,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206705635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065995704] [2021-11-20 06:41:58,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:41:58,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:58,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:58,753 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:58,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:41:58,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:41:58,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:41:58,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:41:58,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:41:59,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:41:59,290 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 06:41:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 06:42:00,145 INFO L354 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-11-20 06:42:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 37 [2021-11-20 06:42:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:00,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-11-20 06:42:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:02,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065995704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:02,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:02,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 45 [2021-11-20 06:42:02,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305763058] [2021-11-20 06:42:02,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:02,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 06:42:02,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 06:42:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1845, Unknown=1, NotChecked=0, Total=1980 [2021-11-20 06:42:02,280 INFO L87 Difference]: Start difference. First operand 174 states and 190 transitions. Second operand has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:03,785 INFO L93 Difference]: Finished difference Result 293 states and 316 transitions. [2021-11-20 06:42:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:42:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-20 06:42:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:03,787 INFO L225 Difference]: With dead ends: 293 [2021-11-20 06:42:03,787 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:42:03,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=425, Invalid=4404, Unknown=1, NotChecked=0, Total=4830 [2021-11-20 06:42:03,790 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 149 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:03,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 677 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 485 Invalid, 0 Unknown, 236 Unchecked, 0.3s Time] [2021-11-20 06:42:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:42:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 227. [2021-11-20 06:42:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0977777777777777) internal successors, (247), 226 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 247 transitions. [2021-11-20 06:42:03,797 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 247 transitions. Word has length 63 [2021-11-20 06:42:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:03,797 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 247 transitions. [2021-11-20 06:42:03,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 247 transitions. [2021-11-20 06:42:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:42:03,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:03,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:03,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:42:04,002 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:42:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1936363915, now seen corresponding path program 1 times [2021-11-20 06:42:04,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518607863] [2021-11-20 06:42:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:04,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:04,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:04,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518607863] [2021-11-20 06:42:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518607863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:04,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697263386] [2021-11-20 06:42:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:04,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:04,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:04,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:42:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:04,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:42:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:04,242 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:42:04,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:42:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:05,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697263386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:05,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:05,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-11-20 06:42:05,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204298729] [2021-11-20 06:42:05,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:05,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:42:05,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:42:05,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:42:05,173 INFO L87 Difference]: Start difference. First operand 227 states and 247 transitions. Second operand has 28 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:05,529 INFO L93 Difference]: Finished difference Result 359 states and 390 transitions. [2021-11-20 06:42:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:42:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 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 63 [2021-11-20 06:42:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:05,533 INFO L225 Difference]: With dead ends: 359 [2021-11-20 06:42:05,533 INFO L226 Difference]: Without dead ends: 359 [2021-11-20 06:42:05,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:42:05,534 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 314 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:05,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 317 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-20 06:42:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2021-11-20 06:42:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.0987654320987654) internal successors, (267), 244 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 267 transitions. [2021-11-20 06:42:05,545 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 267 transitions. Word has length 63 [2021-11-20 06:42:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:05,545 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 267 transitions. [2021-11-20 06:42:05,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 267 transitions. [2021-11-20 06:42:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 06:42:05,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:05,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:05,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:05,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:42:05,766 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:42:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 5 times [2021-11-20 06:42:05,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:05,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622802405] [2021-11-20 06:42:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:05,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:05,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622802405] [2021-11-20 06:42:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622802405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862947432] [2021-11-20 06:42:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:42:05,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:05,926 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:05,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:42:06,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:42:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:42:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:06,033 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:42:06,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:42:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:42:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862947432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:07,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:07,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2021-11-20 06:42:07,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766862607] [2021-11-20 06:42:07,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:42:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:42:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:42:07,002 INFO L87 Difference]: Start difference. First operand 245 states and 267 transitions. Second operand has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:07,609 INFO L93 Difference]: Finished difference Result 362 states and 392 transitions. [2021-11-20 06:42:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:42:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 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 67 [2021-11-20 06:42:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:07,612 INFO L225 Difference]: With dead ends: 362 [2021-11-20 06:42:07,612 INFO L226 Difference]: Without dead ends: 362 [2021-11-20 06:42:07,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:42:07,614 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 462 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:07,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 571 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:42:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-20 06:42:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 303. [2021-11-20 06:42:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.0996677740863787) internal successors, (331), 302 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 331 transitions. [2021-11-20 06:42:07,624 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 331 transitions. Word has length 67 [2021-11-20 06:42:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:07,625 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 331 transitions. [2021-11-20 06:42:07,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 331 transitions. [2021-11-20 06:42:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:42:07,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:07,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2021-11-20 06:42:07,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:07,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:07,842 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:42:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1190420041, now seen corresponding path program 2 times [2021-11-20 06:42:07,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410482647] [2021-11-20 06:42:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:07,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:42:08,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410482647] [2021-11-20 06:42:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410482647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358702293] [2021-11-20 06:42:08,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:42:08,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:08,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:08,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:08,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:42:08,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:42:08,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:42:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:08,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:42:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:42:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:09,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:09,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-20 06:42:09,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 06:42:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:10,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358702293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:10,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:10,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 40 [2021-11-20 06:42:10,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558607102] [2021-11-20 06:42:10,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:10,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 06:42:10,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 06:42:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:42:10,300 INFO L87 Difference]: Start difference. First operand 303 states and 331 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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) [2021-11-20 06:42:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:12,425 INFO L93 Difference]: Finished difference Result 544 states and 579 transitions. [2021-11-20 06:42:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:42:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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 69 [2021-11-20 06:42:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:12,429 INFO L225 Difference]: With dead ends: 544 [2021-11-20 06:42:12,429 INFO L226 Difference]: Without dead ends: 479 [2021-11-20 06:42:12,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=4065, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 06:42:12,432 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 454 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:12,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 1049 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 800 Invalid, 0 Unknown, 432 Unchecked, 0.5s Time] [2021-11-20 06:42:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-20 06:42:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 391. [2021-11-20 06:42:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 389 states have (on average 1.0925449871465296) internal successors, (425), 390 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 425 transitions. [2021-11-20 06:42:12,444 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 425 transitions. Word has length 69 [2021-11-20 06:42:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:12,444 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 425 transitions. [2021-11-20 06:42:12,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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) [2021-11-20 06:42:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 425 transitions. [2021-11-20 06:42:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 06:42:12,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:12,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:12,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:12,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 06:42:12,662 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:42:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1844856972, now seen corresponding path program 3 times [2021-11-20 06:42:12,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:12,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474260679] [2021-11-20 06:42:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:12,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:12,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474260679] [2021-11-20 06:42:12,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474260679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229833348] [2021-11-20 06:42:12,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:42:12,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:12,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:12,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:12,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:42:12,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:42:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:12,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:42:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:13,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 06:42:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:13,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229833348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:13,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:13,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-11-20 06:42:13,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436024548] [2021-11-20 06:42:13,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:13,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 06:42:13,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 06:42:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:42:13,557 INFO L87 Difference]: Start difference. First operand 391 states and 425 transitions. Second operand has 31 states, 30 states have (on average 5.333333333333333) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:13,999 INFO L93 Difference]: Finished difference Result 617 states and 670 transitions. [2021-11-20 06:42:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:42:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.333333333333333) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 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 73 [2021-11-20 06:42:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:14,003 INFO L225 Difference]: With dead ends: 617 [2021-11-20 06:42:14,003 INFO L226 Difference]: Without dead ends: 617 [2021-11-20 06:42:14,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:42:14,005 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 306 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:14,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 478 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:42:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-20 06:42:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 415. [2021-11-20 06:42:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 413 states have (on average 1.0944309927360776) internal successors, (452), 414 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 452 transitions. [2021-11-20 06:42:14,020 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 452 transitions. Word has length 73 [2021-11-20 06:42:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:14,020 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 452 transitions. [2021-11-20 06:42:14,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.333333333333333) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 452 transitions. [2021-11-20 06:42:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:42:14,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:14,022 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:14,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-20 06:42:14,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:14,246 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:42:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:14,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 4 times [2021-11-20 06:42:14,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:14,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740318884] [2021-11-20 06:42:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:14,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:42:14,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740318884] [2021-11-20 06:42:14,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740318884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867649901] [2021-11-20 06:42:14,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:42:14,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:14,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:14,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:42:14,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:42:14,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:42:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:14,963 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:42:14,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:42:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:42:15,732 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 06:42:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 06:42:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:15,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:16,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-20 06:42:16,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:42:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:42:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867649901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:17,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:17,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 48 [2021-11-20 06:42:17,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560186063] [2021-11-20 06:42:17,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 06:42:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:17,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 06:42:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 06:42:17,091 INFO L87 Difference]: Start difference. First operand 415 states and 452 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:20,419 INFO L93 Difference]: Finished difference Result 796 states and 849 transitions. [2021-11-20 06:42:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 06:42:20,420 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 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 79 [2021-11-20 06:42:20,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:20,423 INFO L225 Difference]: With dead ends: 796 [2021-11-20 06:42:20,423 INFO L226 Difference]: Without dead ends: 714 [2021-11-20 06:42:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1361, Invalid=7569, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 06:42:20,427 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1085 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:20,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 1009 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1560 Invalid, 0 Unknown, 281 Unchecked, 0.8s Time] [2021-11-20 06:42:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-20 06:42:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 527. [2021-11-20 06:42:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 525 states have (on average 1.0933333333333333) internal successors, (574), 526 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 574 transitions. [2021-11-20 06:42:20,443 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 574 transitions. Word has length 79 [2021-11-20 06:42:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:20,443 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 574 transitions. [2021-11-20 06:42:20,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 574 transitions. [2021-11-20 06:42:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 06:42:20,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:20,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:20,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:20,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 06:42:20,661 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:42:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 6 times [2021-11-20 06:42:20,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:20,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325515983] [2021-11-20 06:42:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:20,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:21,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325515983] [2021-11-20 06:42:21,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325515983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179296763] [2021-11-20 06:42:21,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:42:21,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:21,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:21,100 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:21,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:42:21,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 06:42:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 06:42:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:21,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:42:21,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 06:42:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:42:27,483 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-11-20 06:42:27,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 76 [2021-11-20 06:42:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:42:27,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:32,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (or (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57| Int)) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse2) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= .cse0 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56|))) (not (= .cse0 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57|))) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56| 0) (< (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57| 1) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56|) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57|) (<= (+ 2 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))))))) is different from false [2021-11-20 06:42:32,467 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-20 06:42:32,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 300 [2021-11-20 06:42:32,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:42:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 276 [2021-11-20 06:42:32,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 272 [2021-11-20 06:42:32,643 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-11-20 06:42:32,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 136 [2021-11-20 06:42:32,731 INFO L354 Elim1Store]: treesize reduction 7, result has 87.9 percent of original size [2021-11-20 06:42:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 145 [2021-11-20 06:42:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:42:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179296763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:33,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:42:33,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 71 [2021-11-20 06:42:33,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850816967] [2021-11-20 06:42:33,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 06:42:33,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 06:42:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4533, Unknown=2, NotChecked=136, Total=4970 [2021-11-20 06:42:33,060 INFO L87 Difference]: Start difference. First operand 527 states and 574 transitions. Second operand has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:57,517 INFO L93 Difference]: Finished difference Result 980 states and 1052 transitions. [2021-11-20 06:44:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-20 06:44:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 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 80 [2021-11-20 06:44:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:57,522 INFO L225 Difference]: With dead ends: 980 [2021-11-20 06:44:57,522 INFO L226 Difference]: Without dead ends: 862 [2021-11-20 06:44:57,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 119 SyntacticMatches, 20 SemanticMatches, 161 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7177 ImplicationChecksByTransitivity, 151.6s TimeCoverageRelationStatistics Valid=2115, Invalid=23929, Unknown=42, NotChecked=320, Total=26406 [2021-11-20 06:44:57,526 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 211 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:57,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1011 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 457 Invalid, 0 Unknown, 593 Unchecked, 0.2s Time] [2021-11-20 06:44:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-20 06:44:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 786. [2021-11-20 06:44:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 784 states have (on average 1.0880102040816326) internal successors, (853), 785 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 853 transitions. [2021-11-20 06:44:57,546 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 853 transitions. Word has length 80 [2021-11-20 06:44:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:57,546 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 853 transitions. [2021-11-20 06:44:57,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 853 transitions. [2021-11-20 06:44:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 06:44:57,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:57,549 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:57,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:57,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 06:44:57,766 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:44:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1938211421, now seen corresponding path program 5 times [2021-11-20 06:44:57,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:57,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227913927] [2021-11-20 06:44:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:57,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 6 proven. 114 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:44:58,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227913927] [2021-11-20 06:44:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227913927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:44:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983797806] [2021-11-20 06:44:58,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:44:58,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:58,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:58,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:44:58,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 06:44:58,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 06:44:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:58,152 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:44:58,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:44:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:58,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:44:59,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983797806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:59,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:44:59,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2021-11-20 06:44:59,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893133722] [2021-11-20 06:44:59,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:59,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:44:59,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:44:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:44:59,529 INFO L87 Difference]: Start difference. First operand 786 states and 853 transitions. Second operand has 33 states, 32 states have (on average 5.71875) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:00,308 INFO L93 Difference]: Finished difference Result 1111 states and 1206 transitions. [2021-11-20 06:45:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:45:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.71875) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-20 06:45:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:00,314 INFO L225 Difference]: With dead ends: 1111 [2021-11-20 06:45:00,314 INFO L226 Difference]: Without dead ends: 1111 [2021-11-20 06:45:00,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=1561, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:45:00,315 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 312 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:00,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 538 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:45:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-20 06:45:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 810. [2021-11-20 06:45:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 808 states have (on average 1.0891089108910892) internal successors, (880), 809 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 880 transitions. [2021-11-20 06:45:00,339 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 880 transitions. Word has length 83 [2021-11-20 06:45:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:00,340 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 880 transitions. [2021-11-20 06:45:00,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.71875) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 880 transitions. [2021-11-20 06:45:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:45:00,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:00,342 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:00,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:00,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:45:00,566 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:45:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1004507895, now seen corresponding path program 6 times [2021-11-20 06:45:00,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:00,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705739753] [2021-11-20 06:45:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:00,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:45:00,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705739753] [2021-11-20 06:45:00,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705739753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:45:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567466076] [2021-11-20 06:45:00,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:45:00,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:45:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:45:00,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:45:00,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:45:00,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 06:45:00,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:00,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 06:45:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:01,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 06:45:13,146 INFO L354 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2021-11-20 06:45:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2021-11-20 06:45:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 140 refuted. 1 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:45:13,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-20 06:45:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2021-11-20 06:45:14,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-11-20 06:45:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:45:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567466076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:14,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:45:14,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 48 [2021-11-20 06:45:14,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956997096] [2021-11-20 06:45:14,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:14,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 06:45:14,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 06:45:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2055, Unknown=4, NotChecked=0, Total=2256 [2021-11-20 06:45:14,672 INFO L87 Difference]: Start difference. First operand 810 states and 880 transitions. Second operand has 48 states, 48 states have (on average 4.25) internal successors, (204), 48 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:33,041 INFO L93 Difference]: Finished difference Result 1374 states and 1484 transitions. [2021-11-20 06:46:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-20 06:46:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.25) internal successors, (204), 48 states have internal predecessors, (204), 0 states have call successors, (0), 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 89 [2021-11-20 06:46:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:33,046 INFO L225 Difference]: With dead ends: 1374 [2021-11-20 06:46:33,046 INFO L226 Difference]: Without dead ends: 1181 [2021-11-20 06:46:33,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2878 ImplicationChecksByTransitivity, 89.4s TimeCoverageRelationStatistics Valid=1187, Invalid=9309, Unknown=10, NotChecked=0, Total=10506 [2021-11-20 06:46:33,048 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:33,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 1009 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 876 Invalid, 0 Unknown, 321 Unchecked, 0.4s Time] [2021-11-20 06:46:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-11-20 06:46:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 841. [2021-11-20 06:46:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.0833333333333333) internal successors, (910), 840 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 910 transitions. [2021-11-20 06:46:33,071 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 910 transitions. Word has length 89 [2021-11-20 06:46:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:33,071 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 910 transitions. [2021-11-20 06:46:33,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.25) internal successors, (204), 48 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 910 transitions. [2021-11-20 06:46:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 06:46:33,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:33,074 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:33,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:33,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:46:33,298 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:46:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 318466939, now seen corresponding path program 2 times [2021-11-20 06:46:33,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361211551] [2021-11-20 06:46:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:33,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:46:33,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361211551] [2021-11-20 06:46:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361211551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:46:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920651261] [2021-11-20 06:46:33,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:46:33,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:46:33,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:33,982 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:46:33,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:46:34,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:46:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:46:34,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:34,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:46:34,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:46:34,513 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:46:34,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:46:36,448 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 06:46:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-11-20 06:46:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:38,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2021-11-20 06:46:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:39,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920651261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:39,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:46:39,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 43 [2021-11-20 06:46:39,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489667925] [2021-11-20 06:46:39,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:39,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 06:46:39,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 06:46:39,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1671, Unknown=1, NotChecked=0, Total=1806 [2021-11-20 06:46:39,141 INFO L87 Difference]: Start difference. First operand 841 states and 910 transitions. Second operand has 43 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:40,348 INFO L93 Difference]: Finished difference Result 962 states and 1034 transitions. [2021-11-20 06:46:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:46:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 0 states have call successors, (0), 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 90 [2021-11-20 06:46:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:40,351 INFO L225 Difference]: With dead ends: 962 [2021-11-20 06:46:40,351 INFO L226 Difference]: Without dead ends: 578 [2021-11-20 06:46:40,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=349, Invalid=3190, Unknown=1, NotChecked=0, Total=3540 [2021-11-20 06:46:40,353 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 147 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:40,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 851 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 487 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-11-20 06:46:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-20 06:46:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 575. [2021-11-20 06:46:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.0871080139372822) internal successors, (624), 574 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 624 transitions. [2021-11-20 06:46:40,365 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 624 transitions. Word has length 90 [2021-11-20 06:46:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:40,366 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 624 transitions. [2021-11-20 06:46:40,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 624 transitions. [2021-11-20 06:46:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:46:40,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:40,368 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:40,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-20 06:46:40,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:46:40,582 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:46:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash 296080472, now seen corresponding path program 3 times [2021-11-20 06:46:40,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:40,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282139604] [2021-11-20 06:46:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:40,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:40,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282139604] [2021-11-20 06:46:40,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282139604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:46:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903358692] [2021-11-20 06:46:40,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:46:40,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:46:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:40,796 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:46:40,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:46:40,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:46:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:40,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 06:46:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:40,928 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:46:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:46:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:46:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903358692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:42,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:46:42,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-11-20 06:46:42,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296421832] [2021-11-20 06:46:42,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:46:42,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:46:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:46:42,377 INFO L87 Difference]: Start difference. First operand 575 states and 624 transitions. Second operand has 35 states, 34 states have (on average 7.264705882352941) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:42,956 INFO L93 Difference]: Finished difference Result 863 states and 934 transitions. [2021-11-20 06:46:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:46:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 7.264705882352941) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 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 94 [2021-11-20 06:46:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:42,960 INFO L225 Difference]: With dead ends: 863 [2021-11-20 06:46:42,960 INFO L226 Difference]: Without dead ends: 863 [2021-11-20 06:46:42,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:46:42,961 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1081 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:42,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 464 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:46:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-20 06:46:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 715. [2021-11-20 06:46:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.0854341736694677) internal successors, (775), 714 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 775 transitions. [2021-11-20 06:46:42,978 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 775 transitions. Word has length 94 [2021-11-20 06:46:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 775 transitions. [2021-11-20 06:46:42,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 7.264705882352941) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 775 transitions. [2021-11-20 06:46:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:46:42,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:42,981 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:43,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:43,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 06:46:43,205 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:46:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash -209651763, now seen corresponding path program 4 times [2021-11-20 06:46:43,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:43,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173262104] [2021-11-20 06:46:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:43,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:43,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173262104] [2021-11-20 06:46:43,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173262104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:46:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958531525] [2021-11-20 06:46:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:46:43,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:46:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:43,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:46:43,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:46:43,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:46:43,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:46:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:43,687 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:46:43,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:46:43,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:46:44,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:46:44,255 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 06:46:44,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 06:46:45,462 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 06:46:45,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2021-11-20 06:46:45,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 06:46:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 155 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:45,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-11-20 06:46:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:49,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958531525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:49,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:46:49,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2021-11-20 06:46:49,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901516169] [2021-11-20 06:46:49,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:49,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 06:46:49,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 06:46:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1710, Unknown=1, NotChecked=0, Total=1892 [2021-11-20 06:46:49,090 INFO L87 Difference]: Start difference. First operand 715 states and 775 transitions. Second operand has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:49,833 INFO L93 Difference]: Finished difference Result 1298 states and 1396 transitions. [2021-11-20 06:46:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:46:49,834 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 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 107 [2021-11-20 06:46:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:49,837 INFO L225 Difference]: With dead ends: 1298 [2021-11-20 06:46:49,837 INFO L226 Difference]: Without dead ends: 722 [2021-11-20 06:46:49,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=356, Invalid=3065, Unknown=1, NotChecked=0, Total=3422 [2021-11-20 06:46:49,838 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 109 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:49,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 930 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 368 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2021-11-20 06:46:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-20 06:46:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 719. [2021-11-20 06:46:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.084958217270195) internal successors, (779), 718 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 779 transitions. [2021-11-20 06:46:49,853 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 779 transitions. Word has length 107 [2021-11-20 06:46:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:49,853 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 779 transitions. [2021-11-20 06:46:49,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 779 transitions. [2021-11-20 06:46:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:46:49,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:49,856 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:49,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:50,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 06:46:50,082 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:46:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -740047728, now seen corresponding path program 5 times [2021-11-20 06:46:50,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:50,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195232242] [2021-11-20 06:46:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:50,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:50,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:50,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195232242] [2021-11-20 06:46:50,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195232242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:46:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811364359] [2021-11-20 06:46:50,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:46:50,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:46:50,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:50,328 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:46:50,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:46:50,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 06:46:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 06:46:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:50,487 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:46:50,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:46:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 182 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:46:52,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:46:53,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811364359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:53,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:46:53,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 18] total 49 [2021-11-20 06:46:53,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890384884] [2021-11-20 06:46:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:53,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 06:46:53,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 06:46:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 06:46:53,323 INFO L87 Difference]: Start difference. First operand 719 states and 779 transitions. Second operand has 50 states, 49 states have (on average 6.244897959183674) internal successors, (306), 50 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:54,564 INFO L93 Difference]: Finished difference Result 1008 states and 1089 transitions. [2021-11-20 06:46:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:46:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 6.244897959183674) internal successors, (306), 50 states have internal predecessors, (306), 0 states have call successors, (0), 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 111 [2021-11-20 06:46:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:54,568 INFO L225 Difference]: With dead ends: 1008 [2021-11-20 06:46:54,568 INFO L226 Difference]: Without dead ends: 1008 [2021-11-20 06:46:54,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 06:46:54,569 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2206 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:54,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2206 Valid, 981 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 795 Invalid, 0 Unknown, 205 Unchecked, 0.5s Time] [2021-11-20 06:46:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-11-20 06:46:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 859. [2021-11-20 06:46:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.083916083916084) internal successors, (930), 858 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 930 transitions. [2021-11-20 06:46:54,587 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 930 transitions. Word has length 111 [2021-11-20 06:46:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:54,588 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 930 transitions. [2021-11-20 06:46:54,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 6.244897959183674) internal successors, (306), 50 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 930 transitions. [2021-11-20 06:46:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:46:54,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:54,590 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:54,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:54,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:46:54,818 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:46:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash -772988267, now seen corresponding path program 6 times [2021-11-20 06:46:54,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:54,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371237287] [2021-11-20 06:46:54,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:54,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:46:55,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:55,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371237287] [2021-11-20 06:46:55,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371237287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:46:55,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640633289] [2021-11-20 06:46:55,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:46:55,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:46:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:55,226 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:46:55,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:46:55,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:46:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 06:46:55,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:55,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:46:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:46:55,793 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:46:55,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:46:58,351 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-11-20 06:46:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-11-20 06:46:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 265 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:46:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:08,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:47:08,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:47:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 270 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:47:08,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640633289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:08,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:47:08,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 23] total 56 [2021-11-20 06:47:08,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372962348] [2021-11-20 06:47:08,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:08,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 06:47:08,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:08,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 06:47:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2906, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 06:47:08,890 INFO L87 Difference]: Start difference. First operand 859 states and 930 transitions. Second operand has 56 states, 56 states have (on average 5.196428571428571) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:09,531 INFO L93 Difference]: Finished difference Result 1582 states and 1702 transitions. [2021-11-20 06:47:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:47:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.196428571428571) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 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 124 [2021-11-20 06:47:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:09,535 INFO L225 Difference]: With dead ends: 1582 [2021-11-20 06:47:09,535 INFO L226 Difference]: Without dead ends: 866 [2021-11-20 06:47:09,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=256, Invalid=4034, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 06:47:09,536 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 58 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:09,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1528 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 526 Invalid, 0 Unknown, 279 Unchecked, 0.2s Time] [2021-11-20 06:47:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-11-20 06:47:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 863. [2021-11-20 06:47:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.0835266821345708) internal successors, (934), 862 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 934 transitions. [2021-11-20 06:47:09,552 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 934 transitions. Word has length 124 [2021-11-20 06:47:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:09,553 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 934 transitions. [2021-11-20 06:47:09,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.196428571428571) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 934 transitions. [2021-11-20 06:47:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:47:09,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:09,555 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:09,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-20 06:47:09,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:09,782 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:47:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2098926642, now seen corresponding path program 7 times [2021-11-20 06:47:09,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:09,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547653259] [2021-11-20 06:47:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:09,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 28 proven. 269 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:10,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547653259] [2021-11-20 06:47:10,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547653259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091847722] [2021-11-20 06:47:10,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:47:10,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:10,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:10,086 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:10,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:47:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 06:47:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:10,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:11,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 06:47:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091847722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:11,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:47:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-11-20 06:47:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215006305] [2021-11-20 06:47:11,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:11,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:47:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:47:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:47:11,594 INFO L87 Difference]: Start difference. First operand 863 states and 934 transitions. Second operand has 36 states, 35 states have (on average 7.142857142857143) internal successors, (250), 36 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:12,172 INFO L93 Difference]: Finished difference Result 1151 states and 1244 transitions. [2021-11-20 06:47:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:47:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 7.142857142857143) internal successors, (250), 36 states have internal predecessors, (250), 0 states have call successors, (0), 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 128 [2021-11-20 06:47:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:12,177 INFO L225 Difference]: With dead ends: 1151 [2021-11-20 06:47:12,177 INFO L226 Difference]: Without dead ends: 1151 [2021-11-20 06:47:12,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:47:12,177 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 818 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:12,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 771 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:47:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-20 06:47:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1003. [2021-11-20 06:47:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.0828343313373254) internal successors, (1085), 1002 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1085 transitions. [2021-11-20 06:47:12,195 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1085 transitions. Word has length 128 [2021-11-20 06:47:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:12,196 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1085 transitions. [2021-11-20 06:47:12,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 7.142857142857143) internal successors, (250), 36 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1085 transitions. [2021-11-20 06:47:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:47:12,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:12,198 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:12,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:12,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:12,413 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:47:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2041039411, now seen corresponding path program 8 times [2021-11-20 06:47:12,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091773608] [2021-11-20 06:47:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:12,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:12,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091773608] [2021-11-20 06:47:12,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091773608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898938118] [2021-11-20 06:47:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:47:12,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:12,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:12,906 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:12,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:47:13,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:47:13,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:47:13,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 06:47:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:13,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:47:13,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:47:13,556 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:47:13,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:47:15,289 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 06:47:15,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 06:47:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:15,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:16,347 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-11-20 06:47:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-11-20 06:47:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:16,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898938118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:16,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:47:16,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 50 [2021-11-20 06:47:16,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782068944] [2021-11-20 06:47:16,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:16,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 06:47:16,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 06:47:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2206, Unknown=1, NotChecked=94, Total=2450 [2021-11-20 06:47:16,798 INFO L87 Difference]: Start difference. First operand 1003 states and 1085 transitions. Second operand has 50 states, 50 states have (on average 5.88) internal successors, (294), 50 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:19,083 INFO L93 Difference]: Finished difference Result 1866 states and 2008 transitions. [2021-11-20 06:47:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:47:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.88) internal successors, (294), 50 states have internal predecessors, (294), 0 states have call successors, (0), 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 141 [2021-11-20 06:47:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:19,087 INFO L225 Difference]: With dead ends: 1866 [2021-11-20 06:47:19,087 INFO L226 Difference]: Without dead ends: 1010 [2021-11-20 06:47:19,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=232, Invalid=3192, Unknown=2, NotChecked=114, Total=3540 [2021-11-20 06:47:19,088 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 60 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:19,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 2090 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 544 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2021-11-20 06:47:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-11-20 06:47:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1007. [2021-11-20 06:47:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.0825049701789264) internal successors, (1089), 1006 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1089 transitions. [2021-11-20 06:47:19,106 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1089 transitions. Word has length 141 [2021-11-20 06:47:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:19,106 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1089 transitions. [2021-11-20 06:47:19,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.88) internal successors, (294), 50 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1089 transitions. [2021-11-20 06:47:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 06:47:19,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:19,109 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:19,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:19,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:19,322 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:47:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -781081034, now seen corresponding path program 9 times [2021-11-20 06:47:19,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:19,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058475030] [2021-11-20 06:47:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:19,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 45 proven. 362 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:19,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058475030] [2021-11-20 06:47:19,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058475030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804554113] [2021-11-20 06:47:19,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:47:19,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:19,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:19,672 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:19,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:47:19,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 06:47:19,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:47:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:47:19,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:20,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:21,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 06:47:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:21,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804554113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:21,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:47:21,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2021-11-20 06:47:21,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686555451] [2021-11-20 06:47:21,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:21,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 06:47:21,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 06:47:21,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:47:21,385 INFO L87 Difference]: Start difference. First operand 1007 states and 1089 transitions. Second operand has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:22,001 INFO L93 Difference]: Finished difference Result 1295 states and 1399 transitions. [2021-11-20 06:47:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:47:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 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 145 [2021-11-20 06:47:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:22,005 INFO L225 Difference]: With dead ends: 1295 [2021-11-20 06:47:22,005 INFO L226 Difference]: Without dead ends: 1295 [2021-11-20 06:47:22,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:47:22,006 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 616 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:22,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 808 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:47:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-20 06:47:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1147. [2021-11-20 06:47:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.0820244328097732) internal successors, (1240), 1146 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1240 transitions. [2021-11-20 06:47:22,024 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1240 transitions. Word has length 145 [2021-11-20 06:47:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:22,024 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1240 transitions. [2021-11-20 06:47:22,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1240 transitions. [2021-11-20 06:47:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 06:47:22,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:22,027 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:22,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:22,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:22,250 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:47:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1703255727, now seen corresponding path program 10 times [2021-11-20 06:47:22,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:22,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431621639] [2021-11-20 06:47:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:22,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 127 proven. 378 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:47:22,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431621639] [2021-11-20 06:47:22,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431621639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839236878] [2021-11-20 06:47:22,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:47:22,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:22,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:22,785 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:22,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:47:22,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:47:22,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:47:22,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-20 06:47:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:22,935 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:47:22,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:47:24,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:47:24,238 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 06:47:24,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 06:47:27,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:47:27,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2021-11-20 06:47:33,218 INFO L354 Elim1Store]: treesize reduction 189, result has 27.6 percent of original size [2021-11-20 06:47:33,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 119 [2021-11-20 06:47:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 173 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:47:33,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:39,142 INFO L354 Elim1Store]: treesize reduction 103, result has 27.0 percent of original size [2021-11-20 06:47:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 444 treesize of output 375 [2021-11-20 06:47:39,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:47:39,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 331 treesize of output 313 [2021-11-20 06:47:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 184 [2021-11-20 06:47:39,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:47:39,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:47:39,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:47:39,830 INFO L354 Elim1Store]: treesize reduction 9, result has 85.5 percent of original size [2021-11-20 06:47:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 124 [2021-11-20 06:47:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 205 proven. 311 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:47:54,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839236878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:54,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:47:54,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 44, 44] total 104 [2021-11-20 06:47:54,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071576528] [2021-11-20 06:47:54,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:54,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-20 06:47:54,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-20 06:47:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=10072, Unknown=1, NotChecked=0, Total=10712 [2021-11-20 06:47:54,581 INFO L87 Difference]: Start difference. First operand 1147 states and 1240 transitions. Second operand has 104 states, 104 states have (on average 4.346153846153846) internal successors, (452), 104 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:11,953 INFO L93 Difference]: Finished difference Result 2126 states and 2284 transitions. [2021-11-20 06:48:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-20 06:48:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.346153846153846) internal successors, (452), 104 states have internal predecessors, (452), 0 states have call successors, (0), 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 [2021-11-20 06:48:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:11,962 INFO L225 Difference]: With dead ends: 2126 [2021-11-20 06:48:11,962 INFO L226 Difference]: Without dead ends: 2076 [2021-11-20 06:48:11,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 280 SyntacticMatches, 7 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12476 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=3232, Invalid=44509, Unknown=1, NotChecked=0, Total=47742 [2021-11-20 06:48:11,965 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 958 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 6078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4483 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:11,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 2051 Invalid, 6078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1544 Invalid, 0 Unknown, 4483 Unchecked, 1.1s Time] [2021-11-20 06:48:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-11-20 06:48:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1690. [2021-11-20 06:48:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0799289520426287) internal successors, (1824), 1689 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1824 transitions. [2021-11-20 06:48:11,989 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1824 transitions. Word has length 158 [2021-11-20 06:48:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 1824 transitions. [2021-11-20 06:48:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.346153846153846) internal successors, (452), 104 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1824 transitions. [2021-11-20 06:48:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 06:48:11,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:11,994 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:12,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:12,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:12,214 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:48:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1086593431, now seen corresponding path program 11 times [2021-11-20 06:48:12,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443373950] [2021-11-20 06:48:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:12,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:48:13,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:13,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443373950] [2021-11-20 06:48:13,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443373950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:48:13,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455145721] [2021-11-20 06:48:13,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:48:13,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:13,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:48:13,138 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:48:13,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:48:13,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-20 06:48:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:48:13,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 06:48:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:48:13,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:48:14,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 06:48:19,821 INFO L354 Elim1Store]: treesize reduction 71, result has 14.5 percent of original size [2021-11-20 06:48:19,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 38 [2021-11-20 06:48:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:48:19,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:22,537 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_cstrspn_~s2#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse1 |ULTIMATE.start_cstrspn_~s2#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) .cse0)))))) is different from false [2021-11-20 06:48:22,557 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 06:48:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-11-20 06:48:22,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:48:22,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 157 [2021-11-20 06:48:22,659 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 06:48:22,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-11-20 06:48:22,738 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-20 06:48:22,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-20 06:48:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:48:23,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455145721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:23,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:48:23,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 76 [2021-11-20 06:48:23,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062666921] [2021-11-20 06:48:23,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:23,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-20 06:48:23,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-20 06:48:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=5315, Unknown=3, NotChecked=146, Total=5700 [2021-11-20 06:48:23,511 INFO L87 Difference]: Start difference. First operand 1690 states and 1824 transitions. Second operand has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:28,687 INFO L93 Difference]: Finished difference Result 2173 states and 2340 transitions. [2021-11-20 06:48:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 06:48:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 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 [2021-11-20 06:48:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:28,694 INFO L225 Difference]: With dead ends: 2173 [2021-11-20 06:48:28,694 INFO L226 Difference]: Without dead ends: 2165 [2021-11-20 06:48:28,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=401, Invalid=8342, Unknown=3, NotChecked=184, Total=8930 [2021-11-20 06:48:28,695 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 65 mSDsluCounter, 2528 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:28,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2592 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 887 Invalid, 0 Unknown, 565 Unchecked, 0.4s Time] [2021-11-20 06:48:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-20 06:48:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2162. [2021-11-20 06:48:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.077741786210088) internal successors, (2329), 2161 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2329 transitions. [2021-11-20 06:48:28,720 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2329 transitions. Word has length 158 [2021-11-20 06:48:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:28,720 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 2329 transitions. [2021-11-20 06:48:28,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2329 transitions. [2021-11-20 06:48:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:48:28,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:28,724 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:28,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-20 06:48:28,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-20 06:48:28,925 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:48:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:28,925 INFO L85 PathProgramCache]: Analyzing trace with hash -889628468, now seen corresponding path program 12 times [2021-11-20 06:48:28,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:28,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196384554] [2021-11-20 06:48:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:28,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:48:29,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196384554] [2021-11-20 06:48:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196384554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:48:29,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784741657] [2021-11-20 06:48:29,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:48:29,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:29,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:48:29,697 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:48:29,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:48:29,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 06:48:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:48:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-20 06:48:29,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:48:30,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:48:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 06:48:34,938 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-11-20 06:48:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 37 [2021-11-20 06:48:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 15 proven. 494 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:48:35,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:37,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:48:37,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 130 [2021-11-20 06:48:37,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 06:48:37,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:48:37,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:48:37,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 191 treesize of output 175 [2021-11-20 06:48:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 72 proven. 433 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:48:38,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784741657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:38,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:48:38,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 31] total 81 [2021-11-20 06:48:38,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701816755] [2021-11-20 06:48:38,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:38,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-20 06:48:38,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-20 06:48:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6196, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 06:48:38,538 INFO L87 Difference]: Start difference. First operand 2162 states and 2329 transitions. Second operand has 81 states, 81 states have (on average 4.777777777777778) internal successors, (387), 81 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:40,873 INFO L93 Difference]: Finished difference Result 3448 states and 3723 transitions. [2021-11-20 06:48:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-20 06:48:40,873 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.777777777777778) internal successors, (387), 81 states have internal predecessors, (387), 0 states have call successors, (0), 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 162 [2021-11-20 06:48:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:40,885 INFO L225 Difference]: With dead ends: 3448 [2021-11-20 06:48:40,885 INFO L226 Difference]: Without dead ends: 3434 [2021-11-20 06:48:40,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 275 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=560, Invalid=12096, Unknown=0, NotChecked=0, Total=12656 [2021-11-20 06:48:40,886 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 77 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:40,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1896 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 819 Invalid, 0 Unknown, 536 Unchecked, 0.4s Time] [2021-11-20 06:48:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-11-20 06:48:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2937. [2021-11-20 06:48:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2936 states have (on average 1.0858310626702998) internal successors, (3188), 2936 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 3188 transitions. [2021-11-20 06:48:40,924 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 3188 transitions. Word has length 162 [2021-11-20 06:48:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:40,925 INFO L470 AbstractCegarLoop]: Abstraction has 2937 states and 3188 transitions. [2021-11-20 06:48:40,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.777777777777778) internal successors, (387), 81 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:40,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 3188 transitions. [2021-11-20 06:48:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:48:40,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:40,951 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:40,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:41,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 06:48:41,162 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:48:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 618981644, now seen corresponding path program 13 times [2021-11-20 06:48:41,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:41,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900442478] [2021-11-20 06:48:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:41,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 66 proven. 468 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:48:41,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:41,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900442478] [2021-11-20 06:48:41,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900442478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:48:41,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457902105] [2021-11-20 06:48:41,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:48:41,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:48:41,547 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:48:41,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:48:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 06:48:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:41,705 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:48:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:48:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:48:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 91 proven. 443 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:48:43,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 120 proven. 414 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:48:44,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457902105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:44,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:48:44,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2021-11-20 06:48:44,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307175463] [2021-11-20 06:48:44,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:44,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-20 06:48:44,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:44,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-20 06:48:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2960, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:48:44,618 INFO L87 Difference]: Start difference. First operand 2937 states and 3188 transitions. Second operand has 58 states, 57 states have (on average 7.719298245614035) internal successors, (440), 58 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:46,016 INFO L93 Difference]: Finished difference Result 3793 states and 4114 transitions. [2021-11-20 06:48:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:48:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 7.719298245614035) internal successors, (440), 58 states have internal predecessors, (440), 0 states have call successors, (0), 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 162 [2021-11-20 06:48:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:46,029 INFO L225 Difference]: With dead ends: 3793 [2021-11-20 06:48:46,029 INFO L226 Difference]: Without dead ends: 3793 [2021-11-20 06:48:46,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 06:48:46,030 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 839 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:46,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1521 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:48:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-11-20 06:48:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3077. [2021-11-20 06:48:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 1.0855006501950586) internal successors, (3339), 3076 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 3339 transitions. [2021-11-20 06:48:46,072 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 3339 transitions. Word has length 162 [2021-11-20 06:48:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:46,072 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 3339 transitions. [2021-11-20 06:48:46,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 7.719298245614035) internal successors, (440), 58 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 3339 transitions. [2021-11-20 06:48:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 06:48:46,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:46,079 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:46,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-20 06:48:46,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-20 06:48:46,294 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:48:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:46,294 INFO L85 PathProgramCache]: Analyzing trace with hash 898167171, now seen corresponding path program 14 times [2021-11-20 06:48:46,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:46,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193801496] [2021-11-20 06:48:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:46,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:48:46,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193801496] [2021-11-20 06:48:46,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193801496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:48:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227059299] [2021-11-20 06:48:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:48:46,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:48:46,856 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:48:46,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:48:46,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:48:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:48:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 06:48:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:46,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:48:47,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:48:47,535 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:48:47,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:48:49,857 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 06:48:49,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 06:48:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:48:49,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:58,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:48:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:48:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:48:58,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227059299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:58,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:48:58,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 54 [2021-11-20 06:48:58,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675723344] [2021-11-20 06:48:58,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:58,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 06:48:58,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 06:48:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2701, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 06:48:58,634 INFO L87 Difference]: Start difference. First operand 3077 states and 3339 transitions. Second operand has 54 states, 54 states have (on average 6.185185185185185) internal successors, (334), 54 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:59,380 INFO L93 Difference]: Finished difference Result 3217 states and 3457 transitions. [2021-11-20 06:48:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:48:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.185185185185185) internal successors, (334), 54 states have internal predecessors, (334), 0 states have call successors, (0), 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 164 [2021-11-20 06:48:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:59,385 INFO L225 Difference]: With dead ends: 3217 [2021-11-20 06:48:59,385 INFO L226 Difference]: Without dead ends: 1294 [2021-11-20 06:48:59,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=250, Invalid=3910, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 06:48:59,386 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 64 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:59,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1896 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2021-11-20 06:48:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-11-20 06:48:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1291. [2021-11-20 06:48:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 1.0813953488372092) internal successors, (1395), 1290 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1395 transitions. [2021-11-20 06:48:59,400 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1395 transitions. Word has length 164 [2021-11-20 06:48:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:59,400 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 1395 transitions. [2021-11-20 06:48:59,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.185185185185185) internal successors, (334), 54 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1395 transitions. [2021-11-20 06:48:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 06:48:59,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:59,403 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:59,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:59,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-20 06:48:59,626 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:48:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2108414055, now seen corresponding path program 15 times [2021-11-20 06:48:59,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:59,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057305092] [2021-11-20 06:48:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:59,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 145 proven. 500 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:00,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057305092] [2021-11-20 06:49:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057305092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850949171] [2021-11-20 06:49:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:49:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:00,286 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:00,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:49:00,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-20 06:49:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 06:49:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:49:01,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:49:01,184 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:49:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:49:04,772 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-20 06:49:04,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-11-20 06:49:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 22 proven. 628 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:49:04,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:06,600 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-11-20 06:49:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-11-20 06:49:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 17 proven. 633 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:49:07,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850949171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:07,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:07,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30, 30] total 72 [2021-11-20 06:49:07,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711084307] [2021-11-20 06:49:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:07,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 06:49:07,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 06:49:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=4755, Unknown=1, NotChecked=138, Total=5112 [2021-11-20 06:49:07,335 INFO L87 Difference]: Start difference. First operand 1291 states and 1395 transitions. Second operand has 72 states, 72 states have (on average 5.625) internal successors, (405), 72 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:09,244 INFO L93 Difference]: Finished difference Result 2434 states and 2620 transitions. [2021-11-20 06:49:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:49:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 5.625) internal successors, (405), 72 states have internal predecessors, (405), 0 states have call successors, (0), 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 175 [2021-11-20 06:49:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:09,250 INFO L225 Difference]: With dead ends: 2434 [2021-11-20 06:49:09,250 INFO L226 Difference]: Without dead ends: 1298 [2021-11-20 06:49:09,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 301 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=318, Invalid=6656, Unknown=2, NotChecked=164, Total=7140 [2021-11-20 06:49:09,252 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 68 mSDsluCounter, 3078 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:09,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 3161 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 899 Invalid, 0 Unknown, 572 Unchecked, 0.4s Time] [2021-11-20 06:49:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-11-20 06:49:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1295. [2021-11-20 06:49:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 1.0811437403400308) internal successors, (1399), 1294 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1399 transitions. [2021-11-20 06:49:09,264 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1399 transitions. Word has length 175 [2021-11-20 06:49:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:09,265 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1399 transitions. [2021-11-20 06:49:09,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 5.625) internal successors, (405), 72 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1399 transitions. [2021-11-20 06:49:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:49:09,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:09,268 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:09,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:09,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 06:49:09,482 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:49:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:09,482 INFO L85 PathProgramCache]: Analyzing trace with hash 556876508, now seen corresponding path program 16 times [2021-11-20 06:49:09,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883185536] [2021-11-20 06:49:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:09,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 91 proven. 587 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:09,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883185536] [2021-11-20 06:49:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883185536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359114092] [2021-11-20 06:49:09,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:49:09,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:09,918 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:09,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:49:10,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:49:10,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 06:49:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:10,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:49:10,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:49:10,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:49:11,046 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 06:49:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 06:49:13,701 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-20 06:49:13,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 06:49:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 128 proven. 550 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:14,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:16,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-20 06:49:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 153 proven. 525 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:18,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359114092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:18,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:18,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 72 [2021-11-20 06:49:18,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971900460] [2021-11-20 06:49:18,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-20 06:49:18,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:18,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-20 06:49:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=4699, Unknown=1, NotChecked=0, Total=5256 [2021-11-20 06:49:18,784 INFO L87 Difference]: Start difference. First operand 1295 states and 1399 transitions. Second operand has 73 states, 72 states have (on average 6.972222222222222) internal successors, (502), 73 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:20,574 INFO L93 Difference]: Finished difference Result 1723 states and 1860 transitions. [2021-11-20 06:49:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:49:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 6.972222222222222) internal successors, (502), 73 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-20 06:49:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:20,579 INFO L225 Difference]: With dead ends: 1723 [2021-11-20 06:49:20,579 INFO L226 Difference]: Without dead ends: 1723 [2021-11-20 06:49:20,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 326 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=891, Invalid=7480, Unknown=1, NotChecked=0, Total=8372 [2021-11-20 06:49:20,580 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 424 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:20,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 2453 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 838 Invalid, 0 Unknown, 165 Unchecked, 0.4s Time] [2021-11-20 06:49:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2021-11-20 06:49:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1575. [2021-11-20 06:49:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 1.0806861499364675) internal successors, (1701), 1574 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 1701 transitions. [2021-11-20 06:49:20,598 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 1701 transitions. Word has length 179 [2021-11-20 06:49:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:20,598 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 1701 transitions. [2021-11-20 06:49:20,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 6.972222222222222) internal successors, (502), 73 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 1701 transitions. [2021-11-20 06:49:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 06:49:20,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:20,602 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:20,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:20,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:20,806 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:49:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2059506692, now seen corresponding path program 17 times [2021-11-20 06:49:20,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:20,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402483930] [2021-11-20 06:49:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:20,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 668 proven. 271 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:21,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402483930] [2021-11-20 06:49:21,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402483930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826219741] [2021-11-20 06:49:21,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:49:21,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:21,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:21,307 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:21,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:49:21,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-20 06:49:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:21,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 06:49:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:21,575 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:49:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:49:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 738 proven. 207 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:49:24,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 786 proven. 159 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:49:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826219741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:26,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:26,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 28] total 68 [2021-11-20 06:49:26,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560590852] [2021-11-20 06:49:26,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:26,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-20 06:49:26,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-20 06:49:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=3857, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:49:26,020 INFO L87 Difference]: Start difference. First operand 1575 states and 1701 transitions. Second operand has 68 states, 68 states have (on average 6.5) internal successors, (442), 68 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:26,791 INFO L93 Difference]: Finished difference Result 2987 states and 3217 transitions. [2021-11-20 06:49:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 06:49:26,791 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.5) internal successors, (442), 68 states have internal predecessors, (442), 0 states have call successors, (0), 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 205 [2021-11-20 06:49:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:26,795 INFO L225 Difference]: With dead ends: 2987 [2021-11-20 06:49:26,795 INFO L226 Difference]: Without dead ends: 1579 [2021-11-20 06:49:26,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 384 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1152, Invalid=6680, Unknown=0, NotChecked=0, Total=7832 [2021-11-20 06:49:26,796 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 74 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:26,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1483 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-11-20 06:49:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-20 06:49:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2021-11-20 06:49:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 1.0804816223067173) internal successors, (1705), 1578 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1705 transitions. [2021-11-20 06:49:26,816 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1705 transitions. Word has length 205 [2021-11-20 06:49:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:26,816 INFO L470 AbstractCegarLoop]: Abstraction has 1579 states and 1705 transitions. [2021-11-20 06:49:26,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.5) internal successors, (442), 68 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1705 transitions. [2021-11-20 06:49:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-20 06:49:26,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:26,820 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:26,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-20 06:49:27,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:27,046 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:49:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1989758977, now seen corresponding path program 18 times [2021-11-20 06:49:27,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:27,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162988691] [2021-11-20 06:49:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:27,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 181 proven. 795 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:27,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:27,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162988691] [2021-11-20 06:49:27,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162988691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:27,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128412778] [2021-11-20 06:49:27,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:49:27,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:27,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:27,803 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:27,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 06:49:28,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 06:49:28,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:28,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-20 06:49:28,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:49:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:49:28,863 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:49:28,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:49:33,107 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-11-20 06:49:33,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-11-20 06:49:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 26 proven. 955 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:49:33,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:45,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:49:45,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:49:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 21 proven. 960 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:49:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128412778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:46,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:46,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34, 33] total 81 [2021-11-20 06:49:46,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864548919] [2021-11-20 06:49:46,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:46,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-20 06:49:46,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-20 06:49:46,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=6236, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 06:49:46,909 INFO L87 Difference]: Start difference. First operand 1579 states and 1705 transitions. Second operand has 81 states, 81 states have (on average 5.938271604938271) internal successors, (481), 81 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:48,200 INFO L93 Difference]: Finished difference Result 3002 states and 3232 transitions. [2021-11-20 06:49:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 06:49:48,201 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 5.938271604938271) internal successors, (481), 81 states have internal predecessors, (481), 0 states have call successors, (0), 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 209 [2021-11-20 06:49:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:48,202 INFO L225 Difference]: With dead ends: 3002 [2021-11-20 06:49:48,202 INFO L226 Difference]: Without dead ends: 1586 [2021-11-20 06:49:48,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=356, Invalid=8764, Unknown=0, NotChecked=0, Total=9120 [2021-11-20 06:49:48,203 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 72 mSDsluCounter, 3982 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:48,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 4083 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1080 Invalid, 0 Unknown, 475 Unchecked, 0.5s Time] [2021-11-20 06:49:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-11-20 06:49:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1583. [2021-11-20 06:49:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 1.0802781289506953) internal successors, (1709), 1582 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 1709 transitions. [2021-11-20 06:49:48,216 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 1709 transitions. Word has length 209 [2021-11-20 06:49:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:48,216 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 1709 transitions. [2021-11-20 06:49:48,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.938271604938271) internal successors, (481), 81 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 1709 transitions. [2021-11-20 06:49:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 06:49:48,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:48,220 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:48,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:48,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-20 06:49:48,421 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:49:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -134792574, now seen corresponding path program 19 times [2021-11-20 06:49:48,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:48,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841856076] [2021-11-20 06:49:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:48,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 153 proven. 864 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:49,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841856076] [2021-11-20 06:49:49,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841856076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94650140] [2021-11-20 06:49:49,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:49:49,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:49,025 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:49,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 06:49:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 06:49:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 190 proven. 827 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:50,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 06:49:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 190 proven. 827 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:51,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94650140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:51,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:51,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2021-11-20 06:49:51,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158713550] [2021-11-20 06:49:51,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:51,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 06:49:51,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 06:49:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 06:49:51,636 INFO L87 Difference]: Start difference. First operand 1583 states and 1709 transitions. Second operand has 56 states, 55 states have (on average 7.636363636363637) internal successors, (420), 56 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:52,973 INFO L93 Difference]: Finished difference Result 1871 states and 2019 transitions. [2021-11-20 06:49:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:49:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 7.636363636363637) internal successors, (420), 56 states have internal predecessors, (420), 0 states have call successors, (0), 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 [2021-11-20 06:49:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:52,977 INFO L225 Difference]: With dead ends: 1871 [2021-11-20 06:49:52,977 INFO L226 Difference]: Without dead ends: 1871 [2021-11-20 06:49:52,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=927, Invalid=4043, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 06:49:52,978 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2537 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2537 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:52,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2537 Valid, 1816 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1851 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:49:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-20 06:49:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1723. [2021-11-20 06:49:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 1.0801393728222997) internal successors, (1860), 1722 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 1860 transitions. [2021-11-20 06:49:53,001 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 1860 transitions. Word has length 213 [2021-11-20 06:49:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:53,001 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 1860 transitions. [2021-11-20 06:49:53,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 7.636363636363637) internal successors, (420), 56 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 1860 transitions. [2021-11-20 06:49:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 06:49:53,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:53,005 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:53,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:53,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:53,234 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:49:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:53,234 INFO L85 PathProgramCache]: Analyzing trace with hash 92825059, now seen corresponding path program 20 times [2021-11-20 06:49:53,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:53,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531887243] [2021-11-20 06:49:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:53,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 199 proven. 968 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:53,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:53,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531887243] [2021-11-20 06:49:53,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531887243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:53,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328321714] [2021-11-20 06:49:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:49:53,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:53,956 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:53,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 06:49:54,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:49:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-20 06:49:54,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:54,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:49:54,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:49:54,754 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-20 06:49:54,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2021-11-20 06:49:57,483 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:49:57,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-20 06:49:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 199 proven. 968 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:49:57,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:50:11,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:50:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 199 proven. 968 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328321714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:12,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:12,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 30] total 60 [2021-11-20 06:50:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330027854] [2021-11-20 06:50:12,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:12,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 06:50:12,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 06:50:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 06:50:12,686 INFO L87 Difference]: Start difference. First operand 1723 states and 1860 transitions. Second operand has 60 states, 60 states have (on average 7.25) internal successors, (435), 60 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:13,873 INFO L93 Difference]: Finished difference Result 3286 states and 3538 transitions. [2021-11-20 06:50:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 06:50:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 7.25) internal successors, (435), 60 states have internal predecessors, (435), 0 states have call successors, (0), 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 226 [2021-11-20 06:50:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:13,875 INFO L225 Difference]: With dead ends: 3286 [2021-11-20 06:50:13,876 INFO L226 Difference]: Without dead ends: 1730 [2021-11-20 06:50:13,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 418 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=239, Invalid=5017, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 06:50:13,876 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 76 mSDsluCounter, 4660 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 4770 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:13,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 4770 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1433 Invalid, 0 Unknown, 214 Unchecked, 0.6s Time] [2021-11-20 06:50:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-11-20 06:50:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1727. [2021-11-20 06:50:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 1.0799536500579374) internal successors, (1864), 1726 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 1864 transitions. [2021-11-20 06:50:13,899 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 1864 transitions. Word has length 226 [2021-11-20 06:50:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:13,899 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 1864 transitions. [2021-11-20 06:50:13,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 7.25) internal successors, (435), 60 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 1864 transitions. [2021-11-20 06:50:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-20 06:50:13,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:13,903 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:13,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:14,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-20 06:50:14,130 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:50:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1014771264, now seen corresponding path program 21 times [2021-11-20 06:50:14,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:14,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853571931] [2021-11-20 06:50:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:14,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 190 proven. 1022 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:14,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:14,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853571931] [2021-11-20 06:50:14,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853571931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:14,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688886433] [2021-11-20 06:50:14,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:50:14,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:14,774 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 06:50:15,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-20 06:50:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:15,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:50:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 231 proven. 981 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:18,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 06:50:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 231 proven. 981 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688886433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:18,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:18,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 71 [2021-11-20 06:50:18,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761848128] [2021-11-20 06:50:18,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:18,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 06:50:18,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 06:50:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=4346, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 06:50:18,248 INFO L87 Difference]: Start difference. First operand 1727 states and 1864 transitions. Second operand has 72 states, 71 states have (on average 8.43661971830986) internal successors, (599), 72 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:19,343 INFO L93 Difference]: Finished difference Result 2015 states and 2174 transitions. [2021-11-20 06:50:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:50:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 8.43661971830986) internal successors, (599), 72 states have internal predecessors, (599), 0 states have call successors, (0), 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 [2021-11-20 06:50:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:19,346 INFO L225 Difference]: With dead ends: 2015 [2021-11-20 06:50:19,346 INFO L226 Difference]: Without dead ends: 2015 [2021-11-20 06:50:19,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1504, Invalid=6152, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 06:50:19,347 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2636 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2636 Valid, 1377 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:50:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-11-20 06:50:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1867. [2021-11-20 06:50:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.079849946409432) internal successors, (2015), 1866 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2015 transitions. [2021-11-20 06:50:19,364 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2015 transitions. Word has length 230 [2021-11-20 06:50:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:19,364 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2015 transitions. [2021-11-20 06:50:19,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 8.43661971830986) internal successors, (599), 72 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2015 transitions. [2021-11-20 06:50:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-20 06:50:19,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:19,367 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:19,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:19,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-20 06:50:19,568 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:50:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -484441243, now seen corresponding path program 22 times [2021-11-20 06:50:19,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:19,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407455113] [2021-11-20 06:50:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:19,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 217 proven. 1158 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:20,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407455113] [2021-11-20 06:50:20,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407455113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982290616] [2021-11-20 06:50:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:50:20,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:20,582 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:20,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 06:50:20,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:50:20,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 06:50:20,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:20,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:50:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:50:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:50:22,376 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 06:50:22,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 06:50:26,696 INFO L354 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-11-20 06:50:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 37 [2021-11-20 06:50:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 1087 proven. 288 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:31,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-11-20 06:50:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 1075 proven. 300 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:33,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982290616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:33,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:33,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 90 [2021-11-20 06:50:33,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136056113] [2021-11-20 06:50:33,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:33,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-20 06:50:33,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-20 06:50:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=7315, Unknown=1, NotChecked=0, Total=8010 [2021-11-20 06:50:33,365 INFO L87 Difference]: Start difference. First operand 1867 states and 2015 transitions. Second operand has 90 states, 90 states have (on average 7.4) internal successors, (666), 90 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:36,148 INFO L93 Difference]: Finished difference Result 3570 states and 3844 transitions. [2021-11-20 06:50:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:50:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 7.4) internal successors, (666), 90 states have internal predecessors, (666), 0 states have call successors, (0), 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 243 [2021-11-20 06:50:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:36,151 INFO L225 Difference]: With dead ends: 3570 [2021-11-20 06:50:36,151 INFO L226 Difference]: Without dead ends: 1874 [2021-11-20 06:50:36,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 439 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1249, Invalid=13270, Unknown=1, NotChecked=0, Total=14520 [2021-11-20 06:50:36,152 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 141 mSDsluCounter, 5388 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 5505 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:36,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 5505 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1653 Invalid, 0 Unknown, 114 Unchecked, 0.8s Time] [2021-11-20 06:50:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-20 06:50:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1871. [2021-11-20 06:50:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 1.0796791443850267) internal successors, (2019), 1870 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2019 transitions. [2021-11-20 06:50:36,176 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2019 transitions. Word has length 243 [2021-11-20 06:50:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:36,176 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2019 transitions. [2021-11-20 06:50:36,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 7.4) internal successors, (666), 90 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2019 transitions. [2021-11-20 06:50:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-20 06:50:36,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:36,180 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:36,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:36,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:36,406 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:50:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash 637021480, now seen corresponding path program 23 times [2021-11-20 06:50:36,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:36,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015679348] [2021-11-20 06:50:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:36,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 231 proven. 1193 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:37,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015679348] [2021-11-20 06:50:37,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015679348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611515074] [2021-11-20 06:50:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:50:37,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:37,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:37,224 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:37,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 06:50:37,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-20 06:50:37,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 06:50:37,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:37,559 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:50:37,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:50:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 276 proven. 1154 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:50:43,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 325 proven. 1105 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:50:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611515074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:48,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:48,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34, 34] total 96 [2021-11-20 06:50:48,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811238297] [2021-11-20 06:50:48,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-20 06:50:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-20 06:50:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=8397, Unknown=0, NotChecked=0, Total=9312 [2021-11-20 06:50:48,078 INFO L87 Difference]: Start difference. First operand 1871 states and 2019 transitions. Second operand has 97 states, 96 states have (on average 7.4375) internal successors, (714), 97 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:49,352 INFO L93 Difference]: Finished difference Result 2027 states and 2186 transitions. [2021-11-20 06:50:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 06:50:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 7.4375) internal successors, (714), 97 states have internal predecessors, (714), 0 states have call successors, (0), 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 247 [2021-11-20 06:50:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:49,355 INFO L225 Difference]: With dead ends: 2027 [2021-11-20 06:50:49,355 INFO L226 Difference]: Without dead ends: 2027 [2021-11-20 06:50:49,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 454 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3301 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1344, Invalid=12936, Unknown=0, NotChecked=0, Total=14280 [2021-11-20 06:50:49,356 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 502 mSDsluCounter, 4218 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 4343 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:49,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 4343 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 104 Unchecked, 0.0s Time] [2021-11-20 06:50:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-11-20 06:50:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2011. [2021-11-20 06:50:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 1.0796019900497513) internal successors, (2170), 2010 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2170 transitions. [2021-11-20 06:50:49,371 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2170 transitions. Word has length 247 [2021-11-20 06:50:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:49,372 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 2170 transitions. [2021-11-20 06:50:49,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 7.4375) internal successors, (714), 97 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2170 transitions. [2021-11-20 06:50:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-20 06:50:49,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:49,375 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:49,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:49,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-20 06:50:49,576 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:50:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1242468099, now seen corresponding path program 24 times [2021-11-20 06:50:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095218687] [2021-11-20 06:50:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:49,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 235 proven. 1365 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:50:50,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095218687] [2021-11-20 06:50:50,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095218687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365822940] [2021-11-20 06:50:50,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:50:50,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:50,646 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:50,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 06:50:51,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-20 06:50:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-20 06:50:51,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:51,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:50:52,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:50:52,474 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 06:50:52,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:50:58,372 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-11-20 06:50:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-11-20 06:50:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 32 proven. 1573 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:50:58,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:00,331 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) 0)) is different from false [2021-11-20 06:51:00,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-11-20 06:51:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 27 proven. 1578 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:51:01,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365822940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:01,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:01,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 40, 40] total 97 [2021-11-20 06:51:01,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92051209] [2021-11-20 06:51:01,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:01,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-20 06:51:01,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-20 06:51:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=8835, Unknown=1, NotChecked=188, Total=9312 [2021-11-20 06:51:01,674 INFO L87 Difference]: Start difference. First operand 2011 states and 2170 transitions. Second operand has 97 states, 97 states have (on average 6.134020618556701) internal successors, (595), 97 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:06,908 INFO L93 Difference]: Finished difference Result 3854 states and 4150 transitions. [2021-11-20 06:51:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 06:51:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 6.134020618556701) internal successors, (595), 97 states have internal predecessors, (595), 0 states have call successors, (0), 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 260 [2021-11-20 06:51:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:06,911 INFO L225 Difference]: With dead ends: 3854 [2021-11-20 06:51:06,911 INFO L226 Difference]: Without dead ends: 2018 [2021-11-20 06:51:06,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 456 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=409, Invalid=12474, Unknown=3, NotChecked=224, Total=13110 [2021-11-20 06:51:06,912 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 88 mSDsluCounter, 6239 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 6367 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1006 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 6367 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1953 Invalid, 0 Unknown, 1006 Unchecked, 0.8s Time] [2021-11-20 06:51:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-11-20 06:51:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2015. [2021-11-20 06:51:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.0794438927507448) internal successors, (2174), 2014 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2174 transitions. [2021-11-20 06:51:06,929 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2174 transitions. Word has length 260 [2021-11-20 06:51:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:06,929 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2174 transitions. [2021-11-20 06:51:06,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 6.134020618556701) internal successors, (595), 97 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2174 transitions. [2021-11-20 06:51:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 06:51:06,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:06,934 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:06,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:07,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:07,149 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:51:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1771068006, now seen corresponding path program 25 times [2021-11-20 06:51:07,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:07,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794816637] [2021-11-20 06:51:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:07,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 276 proven. 1377 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:07,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794816637] [2021-11-20 06:51:07,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794816637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065115029] [2021-11-20 06:51:07,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:51:07,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:07,986 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:08,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 06:51:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 06:51:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 325 proven. 1328 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:09,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:11,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 06:51:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 325 proven. 1328 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:11,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065115029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:11,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:11,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2021-11-20 06:51:11,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045799428] [2021-11-20 06:51:11,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:11,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-20 06:51:11,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:11,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-20 06:51:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4002, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:51:11,405 INFO L87 Difference]: Start difference. First operand 2015 states and 2174 transitions. Second operand has 68 states, 67 states have (on average 7.791044776119403) internal successors, (522), 68 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:13,340 INFO L93 Difference]: Finished difference Result 2303 states and 2484 transitions. [2021-11-20 06:51:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:51:13,340 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 7.791044776119403) internal successors, (522), 68 states have internal predecessors, (522), 0 states have call successors, (0), 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 264 [2021-11-20 06:51:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:13,347 INFO L225 Difference]: With dead ends: 2303 [2021-11-20 06:51:13,348 INFO L226 Difference]: Without dead ends: 2303 [2021-11-20 06:51:13,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 490 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1350, Invalid=5960, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 06:51:13,349 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2657 mSDsluCounter, 2855 mSDsCounter, 0 mSdLazyCounter, 3145 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2657 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 3145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:13,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2657 Valid, 3000 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 3145 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:51:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-11-20 06:51:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2155. [2021-11-20 06:51:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 1.0793871866295264) internal successors, (2325), 2154 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2325 transitions. [2021-11-20 06:51:13,375 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2325 transitions. Word has length 264 [2021-11-20 06:51:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:13,375 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 2325 transitions. [2021-11-20 06:51:13,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 7.791044776119403) internal successors, (522), 68 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2325 transitions. [2021-11-20 06:51:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-20 06:51:13,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:13,380 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:13,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:13,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:13,606 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:51:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1977564725, now seen corresponding path program 26 times [2021-11-20 06:51:13,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:13,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660744469] [2021-11-20 06:51:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:13,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 253 proven. 1589 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:14,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660744469] [2021-11-20 06:51:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660744469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:14,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024277313] [2021-11-20 06:51:14,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:51:14,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:14,638 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:14,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 06:51:14,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:51:14,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-20 06:51:14,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:14,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:51:15,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:51:15,646 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-20 06:51:15,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2021-11-20 06:51:19,044 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:51:19,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-20 06:51:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 253 proven. 1589 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:19,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:27,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:51:27,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:51:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 253 proven. 1589 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:29,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024277313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:29,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:29,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 36] total 72 [2021-11-20 06:51:29,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529659409] [2021-11-20 06:51:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:29,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 06:51:29,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 06:51:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4922, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 06:51:29,033 INFO L87 Difference]: Start difference. First operand 2155 states and 2325 transitions. Second operand has 72 states, 72 states have (on average 7.458333333333333) internal successors, (537), 72 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:30,507 INFO L93 Difference]: Finished difference Result 4138 states and 4456 transitions. [2021-11-20 06:51:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:51:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 7.458333333333333) internal successors, (537), 72 states have internal predecessors, (537), 0 states have call successors, (0), 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 277 [2021-11-20 06:51:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:30,511 INFO L225 Difference]: With dead ends: 4138 [2021-11-20 06:51:30,512 INFO L226 Difference]: Without dead ends: 2162 [2021-11-20 06:51:30,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 514 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=284, Invalid=7372, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 06:51:30,513 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 72 mSDsluCounter, 7120 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 7257 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 516 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:30,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 7257 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1616 Invalid, 0 Unknown, 516 Unchecked, 0.7s Time] [2021-11-20 06:51:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-11-20 06:51:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2159. [2021-11-20 06:51:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 1.0792400370713624) internal successors, (2329), 2158 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 2329 transitions. [2021-11-20 06:51:30,538 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 2329 transitions. Word has length 277 [2021-11-20 06:51:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:30,539 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 2329 transitions. [2021-11-20 06:51:30,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 7.458333333333333) internal successors, (537), 72 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 2329 transitions. [2021-11-20 06:51:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-20 06:51:30,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:30,544 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:30,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-20 06:51:30,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:30,766 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:51:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash 617134798, now seen corresponding path program 27 times [2021-11-20 06:51:30,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:30,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38990231] [2021-11-20 06:51:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:30,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 325 proven. 1574 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:31,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38990231] [2021-11-20 06:51:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38990231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637485388] [2021-11-20 06:51:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:51:31,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:31,664 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:31,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 06:51:32,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-20 06:51:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 06:51:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 378 proven. 1521 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:34,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 06:51:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 378 proven. 1521 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:36,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637485388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:36,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:36,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 86 [2021-11-20 06:51:36,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923922827] [2021-11-20 06:51:36,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:36,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-20 06:51:36,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-20 06:51:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1129, Invalid=6353, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 06:51:36,684 INFO L87 Difference]: Start difference. First operand 2159 states and 2329 transitions. Second operand has 87 states, 86 states have (on average 8.604651162790697) internal successors, (740), 87 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:38,364 INFO L93 Difference]: Finished difference Result 2447 states and 2639 transitions. [2021-11-20 06:51:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:51:38,364 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 8.604651162790697) internal successors, (740), 87 states have internal predecessors, (740), 0 states have call successors, (0), 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 281 [2021-11-20 06:51:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:38,369 INFO L225 Difference]: With dead ends: 2447 [2021-11-20 06:51:38,369 INFO L226 Difference]: Without dead ends: 2447 [2021-11-20 06:51:38,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2179, Invalid=8951, Unknown=0, NotChecked=0, Total=11130 [2021-11-20 06:51:38,371 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 3145 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3145 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:38,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3145 Valid, 2357 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:51:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-11-20 06:51:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2299. [2021-11-20 06:51:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 1.0791993037423846) internal successors, (2480), 2298 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 2480 transitions. [2021-11-20 06:51:38,397 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 2480 transitions. Word has length 281 [2021-11-20 06:51:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:38,398 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 2480 transitions. [2021-11-20 06:51:38,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 8.604651162790697) internal successors, (740), 87 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 2480 transitions. [2021-11-20 06:51:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-20 06:51:38,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:38,403 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:38,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:38,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-20 06:51:38,617 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:51:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash -419512041, now seen corresponding path program 28 times [2021-11-20 06:51:38,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859589711] [2021-11-20 06:51:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:38,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 271 proven. 1830 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:51:39,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859589711] [2021-11-20 06:51:39,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859589711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924523592] [2021-11-20 06:51:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:51:39,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:39,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:39,704 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:39,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 06:51:39,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:51:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-20 06:51:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:39,907 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:51:39,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:51:42,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-20 06:51:42,269 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 06:51:42,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-11-20 06:52:55,840 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:52:55,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2021-11-20 06:52:58,420 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-20 06:52:58,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 65 [2021-11-20 06:52:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1159 proven. 768 refuted. 185 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:52:58,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2021-11-20 06:53:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1396 proven. 716 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:53:12,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924523592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:12,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:53:12,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 49, 49] total 131 [2021-11-20 06:53:12,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123917469] [2021-11-20 06:53:12,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:12,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-20 06:53:12,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-20 06:53:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=15812, Unknown=18, NotChecked=0, Total=17030 [2021-11-20 06:53:12,812 INFO L87 Difference]: Start difference. First operand 2299 states and 2480 transitions. Second operand has 131 states, 131 states have (on average 6.572519083969466) internal successors, (861), 131 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:50,955 INFO L93 Difference]: Finished difference Result 4422 states and 4762 transitions. [2021-11-20 06:53:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-20 06:53:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 6.572519083969466) internal successors, (861), 131 states have internal predecessors, (861), 0 states have call successors, (0), 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 294 [2021-11-20 06:53:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:50,958 INFO L225 Difference]: With dead ends: 4422 [2021-11-20 06:53:50,958 INFO L226 Difference]: Without dead ends: 2306 [2021-11-20 06:53:50,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 544 SyntacticMatches, 4 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7923 ImplicationChecksByTransitivity, 106.3s TimeCoverageRelationStatistics Valid=2614, Invalid=36769, Unknown=19, NotChecked=0, Total=39402 [2021-11-20 06:53:50,960 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 532 mSDsluCounter, 7561 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 7704 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 627 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:50,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 7704 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2424 Invalid, 0 Unknown, 627 Unchecked, 1.2s Time] [2021-11-20 06:53:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-11-20 06:53:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2303. [2021-11-20 06:53:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 1.0790616854908774) internal successors, (2484), 2302 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2484 transitions. [2021-11-20 06:53:50,987 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2484 transitions. Word has length 294 [2021-11-20 06:53:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:50,987 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2484 transitions. [2021-11-20 06:53:50,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 6.572519083969466) internal successors, (861), 131 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2484 transitions. [2021-11-20 06:53:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-20 06:53:50,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:50,992 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:51,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:51,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:51,193 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:53:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1105038964, now seen corresponding path program 29 times [2021-11-20 06:53:51,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:51,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840971556] [2021-11-20 06:53:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:51,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2174 backedges. 378 proven. 1784 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:53:52,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840971556] [2021-11-20 06:53:52,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840971556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482656197] [2021-11-20 06:53:52,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:53:52,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:52,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:52,206 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:52,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 06:53:52,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-20 06:53:52,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:53:52,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-20 06:53:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2174 backedges. 435 proven. 1727 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:53:54,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:53:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2174 backedges. 435 proven. 1727 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:53:58,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482656197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:58,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:53:58,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 90 [2021-11-20 06:53:58,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774520715] [2021-11-20 06:53:58,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-20 06:53:58,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-20 06:53:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=7081, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 06:53:58,131 INFO L87 Difference]: Start difference. First operand 2303 states and 2484 transitions. Second operand has 91 states, 90 states have (on average 7.355555555555555) internal successors, (662), 91 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:00,902 INFO L93 Difference]: Finished difference Result 2591 states and 2794 transitions. [2021-11-20 06:54:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 06:54:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 7.355555555555555) internal successors, (662), 91 states have internal predecessors, (662), 0 states have call successors, (0), 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 298 [2021-11-20 06:54:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:00,905 INFO L225 Difference]: With dead ends: 2591 [2021-11-20 06:54:00,906 INFO L226 Difference]: Without dead ends: 2591 [2021-11-20 06:54:00,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 540 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2432, Invalid=9778, Unknown=0, NotChecked=0, Total=12210 [2021-11-20 06:54:00,907 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2734 mSDsluCounter, 3312 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2734 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 4021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 3822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:00,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2734 Valid, 3475 Invalid, 4021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:54:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-11-20 06:54:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2443. [2021-11-20 06:54:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 1.079033579033579) internal successors, (2635), 2442 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 2635 transitions. [2021-11-20 06:54:00,938 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 2635 transitions. Word has length 298 [2021-11-20 06:54:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:00,938 INFO L470 AbstractCegarLoop]: Abstraction has 2443 states and 2635 transitions. [2021-11-20 06:54:00,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 7.355555555555555) internal successors, (662), 91 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 2635 transitions. [2021-11-20 06:54:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-20 06:54:00,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:00,944 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:00,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a8b4c9-6eb0-43b5-8cea-078041df70d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0