./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-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_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/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_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/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_24460c2d-d20b-48b6-a9a3-b60e19adc48c/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 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:27:39,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:27:39,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:27:39,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:27:39,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:27:39,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:27:39,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:27:39,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:27:39,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:27:39,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:27:39,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:27:39,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:27:39,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:27:39,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:27:39,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:27:39,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:27:39,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:27:39,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:27:39,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:27:39,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:27:39,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:27:39,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:27:39,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:27:39,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:27:39,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:27:39,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:27:39,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:27:39,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:27:39,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:27:39,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:27:39,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:27:39,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:27:39,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:27:39,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:27:39,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:27:39,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:27:39,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:27:39,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:27:39,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:27:39,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:27:39,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:27:39,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:27:39,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:27:39,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:27:39,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:27:39,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:27:39,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:27:39,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:27:39,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:27:39,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:27:39,385 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:27:39,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:27:39,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:27:39,386 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:27:39,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:27:39,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:27:39,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:27:39,387 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:27:39,387 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:27:39,387 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:27:39,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:27:39,387 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:27:39,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:27:39,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:27:39,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:27:39,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:27:39,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:27:39,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:27:39,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:27:39,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:27:39,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:27:39,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:27:39,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:27:39,390 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_24460c2d-d20b-48b6-a9a3-b60e19adc48c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2021-11-20 07:27:39,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:27:39,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:27:39,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:27:39,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:27:39,678 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:27:39,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-11-20 07:27:39,759 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/data/0cb51bcf7/c12ffa9644df407fb85fa4875b789288/FLAGb490cbcd3 [2021-11-20 07:27:40,216 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:27:40,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-11-20 07:27:40,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/data/0cb51bcf7/c12ffa9644df407fb85fa4875b789288/FLAGb490cbcd3 [2021-11-20 07:27:40,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/data/0cb51bcf7/c12ffa9644df407fb85fa4875b789288 [2021-11-20 07:27:40,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:27:40,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:27:40,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:27:40,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:27:40,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:27:40,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:27:40" (1/1) ... [2021-11-20 07:27:40,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655a22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:40, skipping insertion in model container [2021-11-20 07:27:40,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:27:40" (1/1) ... [2021-11-20 07:27:40,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:27:40,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:27:41,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:27:41,009 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:27:41,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:27:41,073 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:27:41,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41 WrapperNode [2021-11-20 07:27:41,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:27:41,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:27:41,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:27:41,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:27:41,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,118 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2021-11-20 07:27:41,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:27:41,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:27:41,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:27:41,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:27:41,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:27:41,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:27:41,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:27:41,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:27:41,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (1/1) ... [2021-11-20 07:27:41,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:27:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:41,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:27:41,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:27:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:27:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:27:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:27:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:27:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:27:41,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:27:41,313 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:27:41,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:27:41,603 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:27:41,609 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:27:41,609 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:27:41,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:27:41 BoogieIcfgContainer [2021-11-20 07:27:41,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:27:41,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:27:41,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:27:41,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:27:41,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:27:40" (1/3) ... [2021-11-20 07:27:41,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c31d2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:27:41, skipping insertion in model container [2021-11-20 07:27:41,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:27:41" (2/3) ... [2021-11-20 07:27:41,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c31d2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:27:41, skipping insertion in model container [2021-11-20 07:27:41,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:27:41" (3/3) ... [2021-11-20 07:27:41,620 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2021-11-20 07:27:41,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:27:41,626 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-20 07:27:41,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:27:41,680 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 07:27:41,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-20 07:27:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.9333333333333333) 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 07:27:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:27:41,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:41,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:41,702 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 07:27:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:41,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-20 07:27:41,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:41,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086586804] [2021-11-20 07:27:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:41,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:41,906 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 07:27:41,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:41,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086586804] [2021-11-20 07:27:41,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086586804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:41,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:41,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:27:41,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696990357] [2021-11-20 07:27:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:41,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:41,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:41,957 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.9333333333333333) 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) 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 07:27:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,039 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-11-20 07:27:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:42,042 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 07:27:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,052 INFO L225 Difference]: With dead ends: 92 [2021-11-20 07:27:42,052 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:27:42,055 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 07:27:42,063 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 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 07:27:42,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:27:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-11-20 07:27:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.78125) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 07:27:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-20 07:27:42,113 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2021-11-20 07:27:42,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,113 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-20 07:27:42,113 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 07:27:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-20 07:27:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:27:42,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:27:42,115 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 07:27:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-20 07:27:42,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251462406] [2021-11-20 07:27:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,184 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 07:27:42,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251462406] [2021-11-20 07:27:42,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251462406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:27:42,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95907131] [2021-11-20 07:27:42,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:27:42,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:27:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:27:42,188 INFO L87 Difference]: Start difference. First operand 51 states and 57 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 07:27:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,225 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-20 07:27:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:27:42,226 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 07:27:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,227 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:27:42,227 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 07:27:42,228 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 07:27:42,229 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 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 07:27:42,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 07:27:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-20 07:27:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.71875) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 07:27:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-20 07:27:42,237 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2021-11-20 07:27:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,237 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-20 07:27:42,237 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 07:27:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-20 07:27:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:27:42,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:27:42,239 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 07:27:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-20 07:27:42,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419460588] [2021-11-20 07:27:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,335 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 07:27:42,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419460588] [2021-11-20 07:27:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419460588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:42,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291789725] [2021-11-20 07:27:42,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:42,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:42,340 INFO L87 Difference]: Start difference. First operand 49 states and 55 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 07:27:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,502 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2021-11-20 07:27:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:42,503 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 07:27:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,504 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:27:42,504 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 07:27:42,505 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 07:27:42,506 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 82 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 07:27:42,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 07:27:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2021-11-20 07:27:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 50 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 07:27:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-20 07:27:42,513 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2021-11-20 07:27:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,514 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-20 07:27:42,514 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 07:27:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-20 07:27:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:27:42,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:27:42,515 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 07:27:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-20 07:27:42,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969101787] [2021-11-20 07:27:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,597 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 07:27:42,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969101787] [2021-11-20 07:27:42,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969101787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:42,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298336408] [2021-11-20 07:27:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:42,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:42,600 INFO L87 Difference]: Start difference. First operand 51 states and 58 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 07:27:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,646 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-20 07:27:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:42,647 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 07:27:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,648 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:27:42,648 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 07:27:42,648 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 07:27:42,650 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 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 07:27:42,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 07:27:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-20 07:27:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 07:27:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-20 07:27:42,655 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 9 [2021-11-20 07:27:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,656 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-20 07:27:42,656 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 07:27:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-20 07:27:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:27:42,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:27:42,657 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 07:27:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-20 07:27:42,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102089316] [2021-11-20 07:27:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,696 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 07:27:42,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102089316] [2021-11-20 07:27:42,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102089316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:27:42,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655412333] [2021-11-20 07:27:42,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:42,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:42,699 INFO L87 Difference]: Start difference. First operand 50 states and 57 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 07:27:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,716 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-11-20 07:27:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:42,717 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 07:27:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,718 INFO L225 Difference]: With dead ends: 90 [2021-11-20 07:27:42,718 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:27:42,718 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 07:27:42,720 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 66 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:42,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 94 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:27:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2021-11-20 07:27:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 60 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 07:27:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-20 07:27:42,726 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 9 [2021-11-20 07:27:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,727 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-20 07:27:42,727 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 07:27:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-20 07:27:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:27:42,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:27:42,729 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 07:27:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,729 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-20 07:27:42,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944265631] [2021-11-20 07:27:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,764 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 07:27:42,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944265631] [2021-11-20 07:27:42,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944265631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:27:42,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949716024] [2021-11-20 07:27:42,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:27:42,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:27:42,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:27:42,769 INFO L87 Difference]: Start difference. First operand 61 states and 71 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 07:27:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,801 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-20 07:27:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:27:42,801 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 07:27:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,802 INFO L225 Difference]: With dead ends: 59 [2021-11-20 07:27:42,802 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 07:27:42,803 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 07:27:42,805 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 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 07:27:42,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 07:27:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-20 07:27:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5333333333333334) 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 07:27:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-20 07:27:42,820 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 9 [2021-11-20 07:27:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,820 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-20 07:27:42,821 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 07:27:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-20 07:27:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:27:42,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:27:42,821 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 07:27:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-20 07:27:42,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889901501] [2021-11-20 07:27:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:42,886 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 07:27:42,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889901501] [2021-11-20 07:27:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889901501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:42,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:27:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720079391] [2021-11-20 07:27:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:27:42,889 INFO L87 Difference]: Start difference. First operand 59 states and 69 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 07:27:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:42,971 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-11-20 07:27:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:42,972 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 07:27:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:42,973 INFO L225 Difference]: With dead ends: 90 [2021-11-20 07:27:42,973 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:27:42,973 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 07:27:42,974 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 76 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 07:27:42,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 76 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:27:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2021-11-20 07:27:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 07:27:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-11-20 07:27:42,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 9 [2021-11-20 07:27:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:42,980 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-11-20 07:27:42,980 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 07:27:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-11-20 07:27:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:27:42,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:42,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:42,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:27:42,982 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 07:27:42,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-20 07:27:42,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:42,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74627210] [2021-11-20 07:27:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:42,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:43,028 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 07:27:43,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:43,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74627210] [2021-11-20 07:27:43,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74627210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:43,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:43,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:43,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835615286] [2021-11-20 07:27:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:43,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:43,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:43,030 INFO L87 Difference]: Start difference. First operand 61 states and 72 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 07:27:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:43,060 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-11-20 07:27:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:43,061 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 07:27:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:43,061 INFO L225 Difference]: With dead ends: 60 [2021-11-20 07:27:43,062 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 07:27:43,062 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 07:27:43,063 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 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 07:27:43,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 07:27:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-20 07:27:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.5106382978723405) 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 07:27:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-20 07:27:43,067 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 10 [2021-11-20 07:27:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:43,068 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-20 07:27:43,068 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 07:27:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-20 07:27:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:27:43,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:43,069 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:43,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:27:43,069 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 07:27:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-20 07:27:43,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:43,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878440465] [2021-11-20 07:27:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:43,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:43,180 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 07:27:43,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878440465] [2021-11-20 07:27:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878440465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071929954] [2021-11-20 07:27:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:43,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:43,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:43,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:27:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:27:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:43,368 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:27:43,369 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 07:27:43,375 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 07:27:43,514 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 07:27:43,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:43,725 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 07:27:43,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071929954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:43,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:43,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 07:27:43,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315222793] [2021-11-20 07:27:43,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:43,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:27:43,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:27:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:27:43,729 INFO L87 Difference]: Start difference. First operand 60 states and 71 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 07:27:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:43,977 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-11-20 07:27:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:43,978 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 07:27:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:43,979 INFO L225 Difference]: With dead ends: 137 [2021-11-20 07:27:43,979 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 07:27:43,979 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 07:27:43,982 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 141 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:43,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 224 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 07:27:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 55. [2021-11-20 07:27:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4651162790697674) 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 07:27:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-20 07:27:43,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 11 [2021-11-20 07:27:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:43,992 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-20 07:27:43,992 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 07:27:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-20 07:27:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:27:43,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:43,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:44,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:44,223 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-11-20 07:27:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698182177] [2021-11-20 07:27:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:44,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,304 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 07:27:44,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:44,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698182177] [2021-11-20 07:27:44,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698182177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:44,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:44,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:27:44,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470600265] [2021-11-20 07:27:44,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:44,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:44,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:44,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:44,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:44,307 INFO L87 Difference]: Start difference. First operand 55 states and 63 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 07:27:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:44,376 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-11-20 07:27:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:44,376 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 07:27:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:44,377 INFO L225 Difference]: With dead ends: 72 [2021-11-20 07:27:44,377 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 07:27:44,378 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 07:27:44,378 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 122 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:44,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 59 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 07:27:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-11-20 07:27:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 07:27:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-11-20 07:27:44,388 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 12 [2021-11-20 07:27:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:44,389 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-11-20 07:27:44,389 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 07:27:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-11-20 07:27:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:27:44,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:44,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:44,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:27:44,392 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-11-20 07:27:44,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286522953] [2021-11-20 07:27:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:44,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,440 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 07:27:44,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:44,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286522953] [2021-11-20 07:27:44,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286522953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:44,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:44,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:44,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346631169] [2021-11-20 07:27:44,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:44,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:44,444 INFO L87 Difference]: Start difference. First operand 60 states and 73 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 07:27:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:44,476 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-11-20 07:27:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:44,477 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 07:27:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:44,480 INFO L225 Difference]: With dead ends: 58 [2021-11-20 07:27:44,480 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 07:27:44,480 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 07:27:44,481 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 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 07:27:44,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 07:27:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-20 07:27:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.4375) internal successors, (69), 57 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 07:27:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-20 07:27:44,488 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2021-11-20 07:27:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:44,489 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-20 07:27:44,489 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 07:27:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-20 07:27:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:27:44,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:44,492 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:44,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:27:44,492 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 07:27:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-20 07:27:44,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611670716] [2021-11-20 07:27:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:44,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,593 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 07:27:44,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:44,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611670716] [2021-11-20 07:27:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611670716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:44,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648839615] [2021-11-20 07:27:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:44,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:44,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:44,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:27:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:27:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:44,708 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:27:44,708 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 07:27:44,800 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 07:27:44,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:44,999 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 07:27:44,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648839615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:45,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:45,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 07:27:45,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698952850] [2021-11-20 07:27:45,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:27:45,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:27:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:27:45,002 INFO L87 Difference]: Start difference. First operand 58 states and 69 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 07:27:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,184 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2021-11-20 07:27:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:27:45,184 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 07:27:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,185 INFO L225 Difference]: With dead ends: 118 [2021-11-20 07:27:45,185 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:27:45,185 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 07:27:45,186 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 212 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 169 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:27:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 55. [2021-11-20 07:27:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 54 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 07:27:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-11-20 07:27:45,189 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2021-11-20 07:27:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,189 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-11-20 07:27:45,190 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 07:27:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-11-20 07:27:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:27:45,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:45,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:27:45,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2021-11-20 07:27:45,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:45,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076217699] [2021-11-20 07:27:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:45,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:45,439 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 07:27:45,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:45,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076217699] [2021-11-20 07:27:45,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076217699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:45,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:45,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:27:45,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100072726] [2021-11-20 07:27:45,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:45,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:27:45,441 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 07:27:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,485 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-20 07:27:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-20 07:27:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,486 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:27:45,486 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 07:27:45,487 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 07:27:45,487 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 07:27:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-20 07:27:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) 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 07:27:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-20 07:27:45,490 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-11-20 07:27:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,490 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-20 07:27:45,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 07:27:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-20 07:27:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:27:45,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:27:45,491 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2021-11-20 07:27:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843923804] [2021-11-20 07:27:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:45,552 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 07:27:45,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843923804] [2021-11-20 07:27:45,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843923804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:45,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:45,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:45,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081287644] [2021-11-20 07:27:45,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:27:45,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:27:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:27:45,554 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 07:27:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,635 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-20 07:27:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-20 07:27:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,636 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:27:45,636 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 07:27:45,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:45,637 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 77 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 07:27:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-20 07:27:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3478260869565217) 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 07:27:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-20 07:27:45,638 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2021-11-20 07:27:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,639 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-20 07:27:45,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 07:27:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-20 07:27:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:27:45,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:27:45,640 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2021-11-20 07:27:45,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:45,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443526086] [2021-11-20 07:27:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:45,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:27:45,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443526086] [2021-11-20 07:27:45,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443526086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:45,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:45,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:27:45,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107046351] [2021-11-20 07:27:45,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:45,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:27:45,695 INFO L87 Difference]: Start difference. First operand 54 states and 62 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 07:27:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,742 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-20 07:27:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:45,743 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 07:27:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,743 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:27:45,743 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 07:27:45,744 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 07:27:45,744 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 07:27:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 07:27:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) 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 07:27:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-20 07:27:45,747 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2021-11-20 07:27:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,748 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-20 07:27:45,748 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 07:27:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-20 07:27:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:27:45,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:27:45,749 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 07:27:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2021-11-20 07:27:45,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:45,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708069832] [2021-11-20 07:27:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:45,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:45,813 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 07:27:45,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:45,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708069832] [2021-11-20 07:27:45,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708069832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:45,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:45,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:45,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922872533] [2021-11-20 07:27:45,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:27:45,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:27:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:27:45,815 INFO L87 Difference]: Start difference. First operand 53 states and 61 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 07:27:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,892 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-11-20 07:27:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:45,892 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 07:27:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,893 INFO L225 Difference]: With dead ends: 63 [2021-11-20 07:27:45,893 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 07:27:45,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:27:45,894 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 76 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 07:27:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-11-20 07:27:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) 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 07:27:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-20 07:27:45,900 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 16 [2021-11-20 07:27:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,901 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-20 07:27:45,901 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 07:27:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-20 07:27:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:27:45,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:27:45,902 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2021-11-20 07:27:45,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:45,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864993852] [2021-11-20 07:27:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:45,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:45,949 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 07:27:45,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864993852] [2021-11-20 07:27:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864993852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:45,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:27:45,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097929693] [2021-11-20 07:27:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:45,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:27:45,952 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:45,992 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-20 07:27:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:45,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:27:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:45,993 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:27:45,993 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 07:27:45,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 07:27:45,994 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:45,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 07:27:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 07:27:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.297872340425532) 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 07:27:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-20 07:27:45,996 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 18 [2021-11-20 07:27:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:45,998 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-20 07:27:45,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-20 07:27:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:27:45,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:45,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:45,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:27:46,000 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2021-11-20 07:27:46,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:46,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155248984] [2021-11-20 07:27:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:46,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:46,114 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 07:27:46,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:46,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155248984] [2021-11-20 07:27:46,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155248984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:46,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:46,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:27:46,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391919859] [2021-11-20 07:27:46,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:46,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:27:46,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:27:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:27:46,120 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:46,248 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-11-20 07:27:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:27:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:27:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:46,249 INFO L225 Difference]: With dead ends: 62 [2021-11-20 07:27:46,249 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 07:27:46,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:27:46,250 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:46,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 105 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 07:27:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-11-20 07:27:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) 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 07:27:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-20 07:27:46,253 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 18 [2021-11-20 07:27:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:46,253 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-20 07:27:46,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-20 07:27:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:27:46,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:46,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:46,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:27:46,254 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:46,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2021-11-20 07:27:46,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931443364] [2021-11-20 07:27:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:46,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:46,392 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 07:27:46,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:46,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931443364] [2021-11-20 07:27:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931443364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:46,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:46,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:27:46,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204709653] [2021-11-20 07:27:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:46,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:27:46,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:27:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:46,395 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:46,517 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-11-20 07:27:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:27:46,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:27:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:46,518 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:27:46,518 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:27:46,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:27:46,519 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:46,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 192 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:27:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-11-20 07:27:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 07:27:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-20 07:27:46,522 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2021-11-20 07:27:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:46,522 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-20 07:27:46,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-20 07:27:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:27:46,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:46,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:46,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:27:46,523 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1149914764, now seen corresponding path program 1 times [2021-11-20 07:27:46,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622645845] [2021-11-20 07:27:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:46,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:46,668 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 07:27:46,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622645845] [2021-11-20 07:27:46,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622645845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:46,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:46,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:27:46,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908827709] [2021-11-20 07:27:46,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:46,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:27:46,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:27:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:27:46,671 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:46,801 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-11-20 07:27:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:27:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:27:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:46,802 INFO L225 Difference]: With dead ends: 105 [2021-11-20 07:27:46,802 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 07:27:46,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:27:46,803 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:46,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 148 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 07:27:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2021-11-20 07:27:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 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 07:27:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-11-20 07:27:46,807 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2021-11-20 07:27:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:46,807 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-11-20 07:27:46,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-11-20 07:27:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:27:46,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:46,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:46,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:27:46,808 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1419000974, now seen corresponding path program 1 times [2021-11-20 07:27:46,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508236117] [2021-11-20 07:27:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:46,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:46,875 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 07:27:46,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508236117] [2021-11-20 07:27:46,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508236117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:46,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:46,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:46,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580781496] [2021-11-20 07:27:46,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:46,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:46,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:46,879 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:27:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:46,898 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-11-20 07:27:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:46,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-20 07:27:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:46,899 INFO L225 Difference]: With dead ends: 72 [2021-11-20 07:27:46,900 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 07:27:46,900 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 07:27:46,900 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:46,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 07:27:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-20 07:27:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.225) 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 07:27:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-20 07:27:46,903 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 19 [2021-11-20 07:27:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:46,904 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-20 07:27:46,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:27:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-20 07:27:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:27:46,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:46,905 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 07:27:46,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:27:46,905 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:46,906 INFO L85 PathProgramCache]: Analyzing trace with hash 453336425, now seen corresponding path program 1 times [2021-11-20 07:27:46,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:46,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111356501] [2021-11-20 07:27:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:46,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:47,012 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 07:27:47,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:47,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111356501] [2021-11-20 07:27:47,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111356501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740961423] [2021-11-20 07:27:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:47,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:47,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:47,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:27:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:27:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:47,191 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 11 treesize of output 7 [2021-11-20 07:27:47,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:27:47,406 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 26 treesize of output 10 [2021-11-20 07:27:47,426 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 07:27:47,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:47,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740961423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:47,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:47,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 18 [2021-11-20 07:27:47,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954753134] [2021-11-20 07:27:47,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:47,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:27:47,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:27:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:47,428 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 07:27:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:47,627 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-20 07:27:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:27:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 07:27:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:47,629 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:27:47,629 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 07:27:47,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:27:47,630 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:47,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 190 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-20 07:27:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 07:27:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 07:27:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 07:27:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-20 07:27:47,633 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 22 [2021-11-20 07:27:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-20 07:27:47,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 07:27:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-20 07:27:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:27:47,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:47,634 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 07:27:47,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:47,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 07:27:47,834 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 07:27:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1235607317, now seen corresponding path program 1 times [2021-11-20 07:27:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:47,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972906266] [2021-11-20 07:27:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:47,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:47,945 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 07:27:47,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972906266] [2021-11-20 07:27:47,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972906266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967219766] [2021-11-20 07:27:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:47,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:47,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:27:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:27:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:48,039 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:27:48,039 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 07:27:48,044 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 07:27:48,232 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 07:27:48,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:48,482 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 07:27:48,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967219766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:48,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:48,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2021-11-20 07:27:48,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762191592] [2021-11-20 07:27:48,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:48,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:27:48,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:27:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:27:48,486 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 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 07:27:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:48,795 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-11-20 07:27:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:27:48,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 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) Word has length 22 [2021-11-20 07:27:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:48,797 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:27:48,797 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 07:27:48,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:27:48,798 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 198 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:48,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 109 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 07:27:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-11-20 07:27:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 07:27:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-20 07:27:48,800 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2021-11-20 07:27:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:48,800 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-20 07:27:48,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 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 07:27:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-20 07:27:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:27:48,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:48,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:48,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:49,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:27:49,015 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2007657780, now seen corresponding path program 1 times [2021-11-20 07:27:49,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:49,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867767045] [2021-11-20 07:27:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:49,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:49,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867767045] [2021-11-20 07:27:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867767045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:49,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:49,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 07:27:49,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185341494] [2021-11-20 07:27:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:49,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:27:49,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:27:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:27:49,207 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 07:27:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:49,400 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-20 07:27:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:27:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-20 07:27:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:49,401 INFO L225 Difference]: With dead ends: 51 [2021-11-20 07:27:49,401 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 07:27:49,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:27:49,402 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:49,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 164 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 07:27:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-20 07:27:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 07:27:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-11-20 07:27:49,404 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2021-11-20 07:27:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:49,404 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-11-20 07:27:49,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 07:27:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-11-20 07:27:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:27:49,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:49,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:49,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 07:27:49,406 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2045741993, now seen corresponding path program 1 times [2021-11-20 07:27:49,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770948429] [2021-11-20 07:27:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:49,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:49,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770948429] [2021-11-20 07:27:49,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770948429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777137574] [2021-11-20 07:27:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:49,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:49,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:49,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:49,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:27:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:27:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:49,636 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:27:49,637 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 07:27:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:49,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777137574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:50,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:50,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-11-20 07:27:50,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518780197] [2021-11-20 07:27:50,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:50,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:27:50,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:27:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:27:50,273 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 07:27:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:50,593 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-11-20 07:27:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:27:50,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 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 28 [2021-11-20 07:27:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:50,595 INFO L225 Difference]: With dead ends: 45 [2021-11-20 07:27:50,595 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 07:27:50,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:27:50,596 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 166 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:50,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 112 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 07:27:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-11-20 07:27:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-20 07:27:50,598 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-11-20 07:27:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:50,598 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-20 07:27:50,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 07:27:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-20 07:27:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:27:50,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:50,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:50,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:50,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:27:50,811 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1136965878, now seen corresponding path program 1 times [2021-11-20 07:27:50,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920792031] [2021-11-20 07:27:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:50,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:27:50,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:50,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920792031] [2021-11-20 07:27:50,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920792031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:50,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969785830] [2021-11-20 07:27:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:50,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:50,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:50,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:27:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:50,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 07:27:50,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:50,979 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:27:50,980 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 07:27:50,983 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 07:27:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:51,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:51,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969785830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:51,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:51,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-11-20 07:27:51,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078376909] [2021-11-20 07:27:51,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:51,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:27:51,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:27:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:27:51,567 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 07:27:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:51,936 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-20 07:27:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:27:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 07:27:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:51,937 INFO L225 Difference]: With dead ends: 47 [2021-11-20 07:27:51,937 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 07:27:51,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:27:51,938 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:51,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 141 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 07:27:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-11-20 07:27:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 07:27:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-20 07:27:51,940 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2021-11-20 07:27:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-20 07:27:51,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 07:27:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-20 07:27:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:27:51,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:51,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:51,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:27:52,151 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:27:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:52,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1702563688, now seen corresponding path program 1 times [2021-11-20 07:27:52,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:52,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388289016] [2021-11-20 07:27:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:52,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388289016] [2021-11-20 07:27:52,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388289016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466864201] [2021-11-20 07:27:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:52,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:52,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:52,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:27:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:27:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:52,394 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:27:52,395 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 07:27:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:52,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:53,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466864201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:53,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:53,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2021-11-20 07:27:53,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501895416] [2021-11-20 07:27:53,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:53,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:27:53,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:27:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:27:53,117 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 07:27:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:53,480 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-20 07:27:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:27:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 32 [2021-11-20 07:27:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:53,481 INFO L225 Difference]: With dead ends: 52 [2021-11-20 07:27:53,481 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 07:27:53,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:27:53,482 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 157 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:53,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 179 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 07:27:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-11-20 07:27:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:27:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-20 07:27:53,485 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2021-11-20 07:27:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:53,485 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-20 07:27:53,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 07:27:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-20 07:27:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:27:53,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:53,486 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] [2021-11-20 07:27:53,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:53,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:53,707 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 07:27:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1702514921, now seen corresponding path program 1 times [2021-11-20 07:27:53,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421413382] [2021-11-20 07:27:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:53,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:53,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421413382] [2021-11-20 07:27:53,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421413382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599567866] [2021-11-20 07:27:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:53,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:53,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:53,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:27:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:53,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:27:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:54,171 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 07:27:54,243 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:27:54,243 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 07:27:54,642 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 07:27:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:08,780 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 07:28:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:09,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599567866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:09,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:09,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 29 [2021-11-20 07:28:09,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119255905] [2021-11-20 07:28:09,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:09,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:28:09,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:28:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=704, Unknown=6, NotChecked=0, Total=812 [2021-11-20 07:28:09,125 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 07:28:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:09,603 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-20 07:28:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:28:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 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 32 [2021-11-20 07:28:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:09,604 INFO L225 Difference]: With dead ends: 69 [2021-11-20 07:28:09,604 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 07:28:09,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=211, Invalid=1115, Unknown=6, NotChecked=0, Total=1332 [2021-11-20 07:28:09,606 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:09,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 315 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 210 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2021-11-20 07:28:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 07:28:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-20 07:28:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 07:28:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-20 07:28:09,608 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-11-20 07:28:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:09,608 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-20 07:28:09,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 07:28:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-20 07:28:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:28:09,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:09,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:09,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:09,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:28:09,823 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash 956999220, now seen corresponding path program 2 times [2021-11-20 07:28:09,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:09,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058577539] [2021-11-20 07:28:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:09,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:09,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058577539] [2021-11-20 07:28:09,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058577539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332234936] [2021-11-20 07:28:09,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:28:09,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:09,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:10,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:28:10,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:28:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:28:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:10,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:10,455 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 07:28:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:10,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332234936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:10,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:10,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-20 07:28:10,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787678038] [2021-11-20 07:28:10,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:10,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:28:10,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:28:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:28:10,504 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 07:28:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:10,799 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-11-20 07:28:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:28:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 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 07:28:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:10,800 INFO L225 Difference]: With dead ends: 56 [2021-11-20 07:28:10,800 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 07:28:10,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:28:10,801 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:10,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 158 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:28:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 07:28:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-11-20 07:28:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 07:28:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-20 07:28:10,804 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 36 [2021-11-20 07:28:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:10,805 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-20 07:28:10,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 07:28:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-20 07:28:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:28:10,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:10,806 INFO L514 BasicCegarLoop]: trace histogram [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 07:28:10,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 07:28:11,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:28:11,015 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 553249237, now seen corresponding path program 2 times [2021-11-20 07:28:11,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:11,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583456399] [2021-11-20 07:28:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:11,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:28:11,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583456399] [2021-11-20 07:28:11,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583456399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323961511] [2021-11-20 07:28:11,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:28:11,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:11,277 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:11,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:28:11,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:28:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:28:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:11,554 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 07:28:12,461 INFO L354 Elim1Store]: treesize reduction 33, result has 23.3 percent of original size [2021-11-20 07:28:12,461 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 46 treesize of output 35 [2021-11-20 07:28:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:12,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:13,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:13,531 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 123 treesize of output 123 [2021-11-20 07:28:13,547 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 105 treesize of output 101 [2021-11-20 07:28:13,584 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 40 treesize of output 36 [2021-11-20 07:28:13,618 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 3 [2021-11-20 07:28:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:28:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323961511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:13,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 46 [2021-11-20 07:28:13,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477786290] [2021-11-20 07:28:13,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:28:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:28:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1898, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:28:13,720 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 07:28:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:14,719 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-11-20 07:28:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:28:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 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 38 [2021-11-20 07:28:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:14,722 INFO L225 Difference]: With dead ends: 73 [2021-11-20 07:28:14,722 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 07:28:14,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=359, Invalid=3673, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 07:28:14,724 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:14,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 287 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 362 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2021-11-20 07:28:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 07:28:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2021-11-20 07:28:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 07:28:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-20 07:28:14,729 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 38 [2021-11-20 07:28:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:14,729 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-20 07:28:14,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 07:28:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-20 07:28:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:28:14,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:14,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:14,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 07:28:14,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:14,943 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1309731743, now seen corresponding path program 2 times [2021-11-20 07:28:14,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:14,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539107858] [2021-11-20 07:28:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:14,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:28:15,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539107858] [2021-11-20 07:28:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539107858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659579752] [2021-11-20 07:28:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:28:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:15,105 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:15,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:28:15,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 07:28:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:28:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:28:15,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:28:15,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659579752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:15,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:28:15,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2021-11-20 07:28:15,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450163419] [2021-11-20 07:28:15,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:15,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:28:15,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:28:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:28:15,275 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 07:28:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:15,345 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-11-20 07:28:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:28:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 07:28:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:15,346 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:28:15,346 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 07:28:15,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:28:15,347 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:15,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:28:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 07:28:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-20 07:28:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 07:28:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-11-20 07:28:15,349 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2021-11-20 07:28:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:15,350 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-11-20 07:28:15,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 07:28:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-11-20 07:28:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:28:15,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:15,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:15,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:15,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:28:15,571 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1309682976, now seen corresponding path program 3 times [2021-11-20 07:28:15,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:15,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98724363] [2021-11-20 07:28:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:15,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:28:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98724363] [2021-11-20 07:28:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98724363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:15,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389719277] [2021-11-20 07:28:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:28:15,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:15,804 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:15,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:28:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:28:15,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:15,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 07:28:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:15,905 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:28:15,905 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 07:28:16,188 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 07:28:16,564 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 34 treesize of output 28 [2021-11-20 07:28:16,742 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 07:28:16,743 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 39 treesize of output 24 [2021-11-20 07:28:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:28:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:17,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:17,533 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 109 treesize of output 109 [2021-11-20 07:28:17,565 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 34 treesize of output 32 [2021-11-20 07:28:17,620 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 3 [2021-11-20 07:28:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:28:18,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389719277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:18,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:18,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 45 [2021-11-20 07:28:18,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984723191] [2021-11-20 07:28:18,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:18,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 07:28:18,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 07:28:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:28:18,225 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:20,790 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2021-11-20 07:28:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 07:28:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 07:28:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:20,791 INFO L225 Difference]: With dead ends: 142 [2021-11-20 07:28:20,791 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 07:28:20,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=998, Invalid=6834, Unknown=0, NotChecked=0, Total=7832 [2021-11-20 07:28:20,794 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 366 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:20,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 248 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 602 Invalid, 0 Unknown, 278 Unchecked, 0.4s Time] [2021-11-20 07:28:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 07:28:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-11-20 07:28:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 07:28:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-20 07:28:20,796 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 46 [2021-11-20 07:28:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:20,797 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-20 07:28:20,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-20 07:28:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:28:20,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:20,798 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:28:20,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 07:28:21,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 07:28:21,011 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1724661286, now seen corresponding path program 4 times [2021-11-20 07:28:21,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:21,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043009354] [2021-11-20 07:28:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:21,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:21,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043009354] [2021-11-20 07:28:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043009354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662449439] [2021-11-20 07:28:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:28:21,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:21,173 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:21,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:28:21,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:28:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 07:28:21,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:21,272 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:28:21,273 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 07:28:21,287 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 07:28:21,734 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 07:28:21,777 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:28:21,777 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 07:28:22,594 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-20 07:28:22,594 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 53 treesize of output 41 [2021-11-20 07:28:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:22,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:25,389 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 07:28:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662449439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:26,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:26,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 38 [2021-11-20 07:28:26,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979132528] [2021-11-20 07:28:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:26,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 07:28:26,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 07:28:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1315, Unknown=1, NotChecked=0, Total=1482 [2021-11-20 07:28:26,264 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 39 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 07:28:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:27,360 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-11-20 07:28:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:28:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 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 54 [2021-11-20 07:28:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:27,363 INFO L225 Difference]: With dead ends: 69 [2021-11-20 07:28:27,363 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 07:28:27,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 79 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=2318, Unknown=1, NotChecked=0, Total=2652 [2021-11-20 07:28:27,364 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:27,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 284 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 234 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-11-20 07:28:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 07:28:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-11-20 07:28:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 67 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 07:28:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-11-20 07:28:27,367 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 54 [2021-11-20 07:28:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:27,367 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-11-20 07:28:27,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 07:28:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-11-20 07:28:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:28:27,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:27,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:27,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:27,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:27,583 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 457880571, now seen corresponding path program 3 times [2021-11-20 07:28:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677953973] [2021-11-20 07:28:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:27,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:27,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:27,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677953973] [2021-11-20 07:28:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677953973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:27,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256593373] [2021-11-20 07:28:27,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:28:27,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:27,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:27,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:28:27,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:28:27,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:28:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:28,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:28,481 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 07:28:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:28,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256593373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:28,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:28,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-11-20 07:28:28,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858898701] [2021-11-20 07:28:28,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:28,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:28:28,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:28:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:28:28,542 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:28,992 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-11-20 07:28:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:28:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 07:28:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:28,993 INFO L225 Difference]: With dead ends: 68 [2021-11-20 07:28:28,993 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 07:28:28,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:28:28,995 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:28,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 227 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:28:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 07:28:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 07:28:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 07:28:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-20 07:28:28,998 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 56 [2021-11-20 07:28:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:28,998 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-20 07:28:28,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-20 07:28:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:28:28,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:28,999 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:29,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:29,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:29,227 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -336434998, now seen corresponding path program 4 times [2021-11-20 07:28:29,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894915080] [2021-11-20 07:28:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:29,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:29,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:29,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894915080] [2021-11-20 07:28:29,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894915080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:29,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211176754] [2021-11-20 07:28:29,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:28:29,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:29,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:29,440 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:29,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:28:29,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:28:29,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:29,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 07:28:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:29,539 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:28:29,540 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 07:28:29,542 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 07:28:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:29,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:28:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211176754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:30,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:30,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2021-11-20 07:28:30,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844154115] [2021-11-20 07:28:30,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:30,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:28:30,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:28:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:28:30,224 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 30 states, 30 states have (on average 3.933333333333333) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 07:28:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:30,573 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-11-20 07:28:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:28:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.933333333333333) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 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 62 [2021-11-20 07:28:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:30,574 INFO L225 Difference]: With dead ends: 117 [2021-11-20 07:28:30,575 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 07:28:30,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:28:30,576 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:30,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 145 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:28:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 07:28:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-11-20 07:28:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 07:28:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-20 07:28:30,578 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2021-11-20 07:28:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:30,579 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-20 07:28:30,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.933333333333333) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 07:28:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-20 07:28:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:28:30,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:30,580 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:30,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:30,787 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1124847399, now seen corresponding path program 5 times [2021-11-20 07:28:30,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613961270] [2021-11-20 07:28:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:31,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613961270] [2021-11-20 07:28:31,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613961270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040962010] [2021-11-20 07:28:31,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:28:31,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:31,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:31,309 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:28:31,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:28:31,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 07:28:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:31,453 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:28:31,454 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 07:28:31,898 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 16 treesize of output 12 [2021-11-20 07:28:32,405 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-11-20 07:28:32,405 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 32 treesize of output 36 [2021-11-20 07:28:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:28:32,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:35,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:35,679 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 103 treesize of output 103 [2021-11-20 07:28:35,708 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 40 treesize of output 36 [2021-11-20 07:28:35,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:35,733 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 60 treesize of output 56 [2021-11-20 07:28:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:28:36,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040962010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:36,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:36,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 21] total 61 [2021-11-20 07:28:36,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683747342] [2021-11-20 07:28:36,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-20 07:28:36,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-20 07:28:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3396, Unknown=1, NotChecked=0, Total=3660 [2021-11-20 07:28:36,397 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 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 07:28:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:41,005 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-11-20 07:28:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:28:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 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 66 [2021-11-20 07:28:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:41,007 INFO L225 Difference]: With dead ends: 115 [2021-11-20 07:28:41,007 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:28:41,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1660, Invalid=10111, Unknown=1, NotChecked=0, Total=11772 [2021-11-20 07:28:41,010 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 711 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:41,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 535 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1468 Invalid, 0 Unknown, 172 Unchecked, 0.8s Time] [2021-11-20 07:28:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:28:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-11-20 07:28:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 07:28:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-11-20 07:28:41,013 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 66 [2021-11-20 07:28:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:41,013 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-11-20 07:28:41,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 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 07:28:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-11-20 07:28:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 07:28:41,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:41,015 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:41,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 07:28:41,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 07:28:41,227 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 07:28:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 323232178, now seen corresponding path program 5 times [2021-11-20 07:28:41,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:41,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154644220] [2021-11-20 07:28:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:41,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:28:41,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154644220] [2021-11-20 07:28:41,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154644220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057774558] [2021-11-20 07:28:41,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:28:41,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:41,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:41,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:41,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:28:41,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:28:41,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 07:28:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:42,007 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 07:28:42,707 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 07:28:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:28:42,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:45,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:45,449 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 103 treesize of output 103 [2021-11-20 07:28:45,500 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 40 treesize of output 36 [2021-11-20 07:28:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:28:45,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057774558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:45,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:45,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 24] total 55 [2021-11-20 07:28:45,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379144926] [2021-11-20 07:28:45,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:45,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:28:45,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:28:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2800, Unknown=1, NotChecked=0, Total=2970 [2021-11-20 07:28:45,871 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 55 states, 55 states have (on average 3.1272727272727274) internal successors, (172), 55 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 07:28:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:47,554 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2021-11-20 07:28:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 07:28:47,555 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1272727272727274) internal successors, (172), 55 states have internal predecessors, (172), 0 states have call successors, (0), 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 74 [2021-11-20 07:28:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:47,555 INFO L225 Difference]: With dead ends: 218 [2021-11-20 07:28:47,555 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 07:28:47,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=494, Invalid=7515, Unknown=1, NotChecked=0, Total=8010 [2021-11-20 07:28:47,558 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:47,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 676 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 914 Invalid, 0 Unknown, 203 Unchecked, 0.4s Time] [2021-11-20 07:28:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 07:28:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-11-20 07:28:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 91 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:28:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2021-11-20 07:28:47,565 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 74 [2021-11-20 07:28:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:47,565 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2021-11-20 07:28:47,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1272727272727274) internal successors, (172), 55 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 07:28:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2021-11-20 07:28:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:28:47,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:47,566 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:47,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-20 07:28:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 07:28:47,771 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 07:28:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2104292780, now seen corresponding path program 6 times [2021-11-20 07:28:47,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500113747] [2021-11-20 07:28:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:47,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:48,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500113747] [2021-11-20 07:28:48,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500113747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027781259] [2021-11-20 07:28:48,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:28:48,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:48,035 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:48,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:28:48,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 07:28:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 07:28:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:48,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:48,929 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 07:28:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:49,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027781259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:49,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:49,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2021-11-20 07:28:49,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757673220] [2021-11-20 07:28:49,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:49,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 07:28:49,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 07:28:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 07:28:49,029 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 38 states, 37 states have (on average 4.378378378378378) internal successors, (162), 38 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 07:28:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:49,569 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-11-20 07:28:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:28:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.378378378378378) internal successors, (162), 38 states have internal predecessors, (162), 0 states have call successors, (0), 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 82 [2021-11-20 07:28:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:49,570 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:28:49,570 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:28:49,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=569, Invalid=2083, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 07:28:49,571 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 332 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:49,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 270 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:28:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:28:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-20 07:28:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 07:28:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-11-20 07:28:49,574 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2021-11-20 07:28:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:49,574 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-11-20 07:28:49,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.378378378378378) internal successors, (162), 38 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 07:28:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-11-20 07:28:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:28:49,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:49,575 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:49,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:49,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 07:28:49,787 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 07:28:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1498157893, now seen corresponding path program 7 times [2021-11-20 07:28:49,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680141126] [2021-11-20 07:28:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:49,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:50,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:50,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680141126] [2021-11-20 07:28:50,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680141126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:50,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443678334] [2021-11-20 07:28:50,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:28:50,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:50,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:50,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:28:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 07:28:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:50,288 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 07:28:50,689 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 07:28:50,750 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:28:50,751 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 07:28:51,860 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:28:51,861 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 07:28:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:51,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:52,751 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| 5)) 0)) is different from false [2021-11-20 07:28:52,756 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 07:28:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443678334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:53,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:53,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 48 [2021-11-20 07:28:53,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614263486] [2021-11-20 07:28:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:53,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 07:28:53,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 07:28:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2022, Unknown=1, NotChecked=90, Total=2256 [2021-11-20 07:28:53,139 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 07:28:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:54,996 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2021-11-20 07:28:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:28:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 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 88 [2021-11-20 07:28:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:54,997 INFO L225 Difference]: With dead ends: 160 [2021-11-20 07:28:54,997 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 07:28:54,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=225, Invalid=2969, Unknown=2, NotChecked=110, Total=3306 [2021-11-20 07:28:54,998 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:54,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 618 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 479 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2021-11-20 07:28:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 07:28:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-11-20 07:28:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 07:28:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-11-20 07:28:55,002 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 88 [2021-11-20 07:28:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:55,002 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-11-20 07:28:55,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 07:28:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-11-20 07:28:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 07:28:55,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:55,004 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:55,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:55,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 07:28:55,219 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 07:28:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash -5445416, now seen corresponding path program 8 times [2021-11-20 07:28:55,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417838677] [2021-11-20 07:28:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:55,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:55,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:55,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417838677] [2021-11-20 07:28:55,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417838677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:55,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349235985] [2021-11-20 07:28:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:28:55,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:55,515 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:55,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:28:55,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:28:55,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:28:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:56,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:56,603 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 07:28:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:28:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349235985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:28:56,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:28:56,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2021-11-20 07:28:56,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642225992] [2021-11-20 07:28:56,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 07:28:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 07:28:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 07:28:56,738 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 37 states, 36 states have (on average 4.333333333333333) internal successors, (156), 37 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:57,348 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-11-20 07:28:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:28:57,348 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.333333333333333) internal successors, (156), 37 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-20 07:28:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:57,349 INFO L225 Difference]: With dead ends: 104 [2021-11-20 07:28:57,349 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 07:28:57,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=1821, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:28:57,350 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 406 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:57,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 355 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:28:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 07:28:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-11-20 07:28:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 07:28:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-11-20 07:28:57,353 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 92 [2021-11-20 07:28:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:57,354 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-11-20 07:28:57,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.333333333333333) internal successors, (156), 37 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-11-20 07:28:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 07:28:57,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:57,355 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:57,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 07:28:57,559 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:28:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -938077319, now seen corresponding path program 6 times [2021-11-20 07:28:57,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:57,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983904507] [2021-11-20 07:28:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:57,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:58,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983904507] [2021-11-20 07:28:58,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983904507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113481917] [2021-11-20 07:28:58,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:28:58,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:58,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:58,263 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:58,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:28:58,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 07:28:58,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:28:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 07:28:58,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:58,778 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 07:28:59,079 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 07:28:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:28:59,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:11,773 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 07:30:11,775 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 07:30:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 127 refuted. 8 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:11,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113481917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:11,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:11,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 23] total 50 [2021-11-20 07:30:11,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818816875] [2021-11-20 07:30:11,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:12,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:30:12,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:30:12,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2254, Unknown=42, NotChecked=0, Total=2450 [2021-11-20 07:30:12,001 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 50 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 07:30:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:54,413 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-11-20 07:30:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:30:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 50 states have internal predecessors, (148), 0 states have call successors, (0), 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 07:30:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:54,414 INFO L225 Difference]: With dead ends: 149 [2021-11-20 07:30:54,414 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 07:30:54,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 164 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 115.2s TimeCoverageRelationStatistics Valid=525, Invalid=4958, Unknown=67, NotChecked=0, Total=5550 [2021-11-20 07:30:54,415 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 261 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:54,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 871 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1644 Invalid, 0 Unknown, 170 Unchecked, 0.7s Time] [2021-11-20 07:30:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 07:30:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-11-20 07:30:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 07:30:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-11-20 07:30:54,418 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 94 [2021-11-20 07:30:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:54,419 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-11-20 07:30:54,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 50 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 07:30:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-11-20 07:30:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 07:30:54,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:54,420 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:54,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-20 07:30:54,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-20 07:30:54,643 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:30:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:54,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1626450582, now seen corresponding path program 7 times [2021-11-20 07:30:54,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:54,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192967660] [2021-11-20 07:30:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:54,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:55,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192967660] [2021-11-20 07:30:55,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192967660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152465692] [2021-11-20 07:30:55,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:30:55,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:55,008 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:55,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:30:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:55,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 07:30:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:55,146 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:30:55,147 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 07:30:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:56,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152465692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:57,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:57,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2021-11-20 07:30:57,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248565557] [2021-11-20 07:30:57,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:57,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 07:30:57,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 07:30:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 07:30:57,093 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 54 states, 53 states have (on average 4.264150943396227) internal successors, (226), 54 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 07:30:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:57,877 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-11-20 07:30:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:30:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.264150943396227) internal successors, (226), 54 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 98 [2021-11-20 07:30:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:57,878 INFO L225 Difference]: With dead ends: 107 [2021-11-20 07:30:57,878 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 07:30:57,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=3946, Unknown=0, NotChecked=0, Total=4830 [2021-11-20 07:30:57,879 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 303 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:57,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 442 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:30:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 07:30:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-11-20 07:30:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:30:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-11-20 07:30:57,883 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 98 [2021-11-20 07:30:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:57,883 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-11-20 07:30:57,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.264150943396227) internal successors, (226), 54 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 07:30:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-11-20 07:30:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:30:57,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:57,884 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:57,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:58,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:58,085 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 07:30:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash -464220284, now seen corresponding path program 9 times [2021-11-20 07:30:58,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765204151] [2021-11-20 07:30:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:58,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:58,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765204151] [2021-11-20 07:30:58,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765204151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941981579] [2021-11-20 07:30:58,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:58,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:58,587 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:58,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:30:58,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 07:30:58,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-20 07:30:58,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:58,965 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 07:30:58,973 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 07:31:00,437 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 07:31:00,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:31:00,499 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 42 treesize of output 34 [2021-11-20 07:31:00,525 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-11-20 07:31:00,525 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 34 treesize of output 33 [2021-11-20 07:31:02,304 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-20 07:31:02,304 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 36 treesize of output 23 [2021-11-20 07:31:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 257 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:31:02,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:02,701 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 07:31:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:31:04,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941981579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:04,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:04,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29, 24] total 62 [2021-11-20 07:31:04,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48363125] [2021-11-20 07:31:04,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:04,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 07:31:04,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 07:31:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-11-20 07:31:04,090 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 62 states, 62 states have (on average 3.5806451612903225) internal successors, (222), 62 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 07:31:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:05,306 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2021-11-20 07:31:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:31:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.5806451612903225) internal successors, (222), 62 states have internal predecessors, (222), 0 states have call successors, (0), 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 102 [2021-11-20 07:31:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:05,307 INFO L225 Difference]: With dead ends: 184 [2021-11-20 07:31:05,307 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 07:31:05,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=471, Invalid=5381, Unknown=0, NotChecked=0, Total=5852 [2021-11-20 07:31:05,308 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 170 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:05,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 868 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 996 Invalid, 0 Unknown, 261 Unchecked, 0.5s Time] [2021-11-20 07:31:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 07:31:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-11-20 07:31:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 07:31:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-11-20 07:31:05,312 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 102 [2021-11-20 07:31:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:05,312 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-11-20 07:31:05,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.5806451612903225) internal successors, (222), 62 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 07:31:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-11-20 07:31:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 07:31:05,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:05,314 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:05,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-20 07:31:05,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:05,535 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 07:31:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1438618849, now seen corresponding path program 10 times [2021-11-20 07:31:05,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:05,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559158570] [2021-11-20 07:31:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:05,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:31:05,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559158570] [2021-11-20 07:31:05,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559158570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431082380] [2021-11-20 07:31:05,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:31:05,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:05,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:05,863 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:05,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:31:05,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:31:05,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-20 07:31:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:05,976 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:05,977 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 07:31:06,724 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 07:31:07,414 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 34 treesize of output 28 [2021-11-20 07:31:07,617 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 07:31:07,618 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 39 treesize of output 24 [2021-11-20 07:31:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 104 proven. 95 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:07,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:11,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:31:11,499 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 109 treesize of output 109 [2021-11-20 07:31:11,538 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 34 treesize of output 32 [2021-11-20 07:31:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:13,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431082380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:13,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:13,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 31] total 71 [2021-11-20 07:31:13,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845091488] [2021-11-20 07:31:13,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:13,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 07:31:13,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 07:31:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4600, Unknown=1, NotChecked=0, Total=4970 [2021-11-20 07:31:13,030 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 71 states, 71 states have (on average 3.380281690140845) internal successors, (240), 71 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 07:31:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:21,160 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-11-20 07:31:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 07:31:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.380281690140845) internal successors, (240), 71 states have internal predecessors, (240), 0 states have call successors, (0), 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 106 [2021-11-20 07:31:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:21,162 INFO L225 Difference]: With dead ends: 170 [2021-11-20 07:31:21,162 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 07:31:21,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2152, Invalid=12609, Unknown=1, NotChecked=0, Total=14762 [2021-11-20 07:31:21,165 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 670 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:21,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 803 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1490 Invalid, 0 Unknown, 415 Unchecked, 0.8s Time] [2021-11-20 07:31:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 07:31:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2021-11-20 07:31:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 07:31:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-11-20 07:31:21,169 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 106 [2021-11-20 07:31:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:21,170 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-11-20 07:31:21,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.380281690140845) internal successors, (240), 71 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 07:31:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-11-20 07:31:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:31:21,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:21,172 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:21,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:21,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-20 07:31:21,390 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:31:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1814519393, now seen corresponding path program 8 times [2021-11-20 07:31:21,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065588093] [2021-11-20 07:31:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:21,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:21,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065588093] [2021-11-20 07:31:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065588093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938959324] [2021-11-20 07:31:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:31:21,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:21,917 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:21,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:31:22,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:31:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:22,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 07:31:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:22,070 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:22,071 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 07:31:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:23,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 91 proven. 147 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938959324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:24,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:24,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2021-11-20 07:31:24,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088496917] [2021-11-20 07:31:24,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:24,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 07:31:24,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:24,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 07:31:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:31:24,681 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 07:31:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:25,885 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-11-20 07:31:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:31:25,886 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 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 112 [2021-11-20 07:31:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:25,886 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:31:25,887 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:31:25,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1090, Invalid=4916, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 07:31:25,887 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:25,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 620 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:31:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:31:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-11-20 07:31:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 07:31:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-11-20 07:31:25,891 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 112 [2021-11-20 07:31:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:25,891 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-11-20 07:31:25,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 07:31:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-11-20 07:31:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 07:31:25,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:25,893 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:25,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:26,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-20 07:31:26,099 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 07:31:26,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash -848897523, now seen corresponding path program 11 times [2021-11-20 07:31:26,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157416451] [2021-11-20 07:31:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:26,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 8 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:26,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157416451] [2021-11-20 07:31:26,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157416451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459065481] [2021-11-20 07:31:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:31:26,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:26,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:26,711 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:26,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:31:27,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-20 07:31:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-20 07:31:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:27,199 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 07:31:27,969 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 07:31:28,044 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:31:28,045 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 07:31:29,881 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:31:29,882 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 07:31:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 8 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:29,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:39,281 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 07:31:39,283 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 07:31:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 8 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:39,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459065481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:39,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:39,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 57 [2021-11-20 07:31:39,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798574164] [2021-11-20 07:31:39,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:39,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 07:31:39,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 07:31:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3023, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 07:31:39,914 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 57 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 07:31:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:40,757 INFO L93 Difference]: Finished difference Result 208 states and 211 transitions. [2021-11-20 07:31:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:31:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 57 states have internal predecessors, (222), 0 states have call successors, (0), 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 116 [2021-11-20 07:31:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:40,759 INFO L225 Difference]: With dead ends: 208 [2021-11-20 07:31:40,759 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 07:31:40,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=263, Invalid=4429, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 07:31:40,760 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:40,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 983 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 660 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2021-11-20 07:31:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 07:31:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-11-20 07:31:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 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 07:31:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-11-20 07:31:40,763 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 116 [2021-11-20 07:31:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:40,763 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-11-20 07:31:40,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 57 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 07:31:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-11-20 07:31:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 07:31:40,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:40,765 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:40,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:40,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-20 07:31:40,990 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 07:31:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash -715474774, now seen corresponding path program 12 times [2021-11-20 07:31:40,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:40,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64776220] [2021-11-20 07:31:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:40,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:41,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64776220] [2021-11-20 07:31:41,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64776220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:41,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207864489] [2021-11-20 07:31:41,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:31:41,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:41,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:41,441 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:41,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:31:42,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 07:31:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:42,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 07:31:42,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:44,008 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 11 [2021-11-20 07:31:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:31:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207864489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:44,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:44,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2021-11-20 07:31:44,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391660648] [2021-11-20 07:31:44,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:44,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:31:44,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:31:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2389, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:31:44,604 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 53 states, 52 states have (on average 4.673076923076923) internal successors, (243), 53 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 07:31:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:45,831 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-11-20 07:31:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:31:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.673076923076923) internal successors, (243), 53 states have internal predecessors, (243), 0 states have call successors, (0), 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 120 [2021-11-20 07:31:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:45,832 INFO L225 Difference]: With dead ends: 132 [2021-11-20 07:31:45,832 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 07:31:45,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1073, Invalid=4183, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 07:31:45,833 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 439 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:45,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 439 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:31:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 07:31:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-11-20 07:31:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 07:31:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-11-20 07:31:45,837 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 120 [2021-11-20 07:31:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:45,837 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-11-20 07:31:45,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.673076923076923) internal successors, (243), 53 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 07:31:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-11-20 07:31:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 07:31:45,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:45,839 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:45,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:46,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 07:31:46,051 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:31:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -376490293, now seen corresponding path program 9 times [2021-11-20 07:31:46,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13463811] [2021-11-20 07:31:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:46,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:47,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13463811] [2021-11-20 07:31:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13463811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960826851] [2021-11-20 07:31:47,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:31:47,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:47,342 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:47,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:31:48,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 07:31:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-20 07:31:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:49,208 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 13 treesize of output 9 [2021-11-20 07:31:50,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:31:50,659 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 26 treesize of output 10 [2021-11-20 07:31:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:31:50,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:52,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:31:52,150 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 103 treesize of output 103 [2021-11-20 07:31:52,179 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 40 treesize of output 36 [2021-11-20 07:31:52,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:31:52,218 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 60 treesize of output 56 [2021-11-20 07:31:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:31:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960826851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:54,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:54,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 41, 33] total 92 [2021-11-20 07:31:54,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262934740] [2021-11-20 07:31:54,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:54,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-20 07:31:54,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-20 07:31:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8042, Unknown=0, NotChecked=0, Total=8372 [2021-11-20 07:31:54,107 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 92 states, 92 states have (on average 3.108695652173913) internal successors, (286), 92 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 07:31:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:58,597 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2021-11-20 07:31:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 07:31:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.108695652173913) internal successors, (286), 92 states have internal predecessors, (286), 0 states have call successors, (0), 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 122 [2021-11-20 07:31:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:58,599 INFO L225 Difference]: With dead ends: 189 [2021-11-20 07:31:58,599 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 07:31:58,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=903, Invalid=13617, Unknown=0, NotChecked=0, Total=14520 [2021-11-20 07:31:58,600 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 369 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 4913 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 5259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:58,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1685 Invalid, 5259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4913 Invalid, 0 Unknown, 196 Unchecked, 2.5s Time] [2021-11-20 07:31:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 07:31:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-20 07:31:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 07:31:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-11-20 07:31:58,605 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2021-11-20 07:31:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:58,606 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-11-20 07:31:58,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.108695652173913) internal successors, (286), 92 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 07:31:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-11-20 07:31:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 07:31:58,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:58,607 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:58,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:58,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:58,815 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:31:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1840246888, now seen corresponding path program 10 times [2021-11-20 07:31:58,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222391581] [2021-11-20 07:31:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:58,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:31:59,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222391581] [2021-11-20 07:31:59,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222391581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608514165] [2021-11-20 07:31:59,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:31:59,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:59,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:59,415 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:59,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:31:59,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:31:59,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-20 07:31:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:59,588 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:59,589 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 07:32:00,397 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 16 treesize of output 12 [2021-11-20 07:32:01,549 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-11-20 07:32:01,549 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 32 treesize of output 36 [2021-11-20 07:32:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 98 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:32:01,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:04,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:32:04,266 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 116 treesize of output 116 [2021-11-20 07:32:04,296 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 40 treesize of output 36 [2021-11-20 07:32:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 120 proven. 192 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:07,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608514165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:07,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:07,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 35, 35] total 83 [2021-11-20 07:32:07,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386551650] [2021-11-20 07:32:07,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:07,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-20 07:32:07,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-20 07:32:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=6357, Unknown=0, NotChecked=0, Total=6972 [2021-11-20 07:32:07,006 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 84 states, 83 states have (on average 3.433734939759036) internal successors, (285), 84 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 07:32:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:11,557 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-11-20 07:32:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 07:32:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 3.433734939759036) internal successors, (285), 84 states have internal predecessors, (285), 0 states have call successors, (0), 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 126 [2021-11-20 07:32:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:11,559 INFO L225 Difference]: With dead ends: 141 [2021-11-20 07:32:11,559 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 07:32:11,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1943, Invalid=11167, Unknown=0, NotChecked=0, Total=13110 [2021-11-20 07:32:11,560 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 940 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 3237 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:11,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 1186 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3237 Invalid, 0 Unknown, 140 Unchecked, 1.9s Time] [2021-11-20 07:32:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 07:32:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-11-20 07:32:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.036231884057971) internal successors, (143), 139 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 07:32:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2021-11-20 07:32:11,565 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 126 [2021-11-20 07:32:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:11,566 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2021-11-20 07:32:11,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 3.433734939759036) internal successors, (285), 84 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 07:32:11,566 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2021-11-20 07:32:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:32:11,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:11,567 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:11,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:11,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-20 07:32:11,791 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 07:32:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash 972528726, now seen corresponding path program 13 times [2021-11-20 07:32:11,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:11,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401096716] [2021-11-20 07:32:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:11,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:12,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:12,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401096716] [2021-11-20 07:32:12,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401096716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:12,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565106088] [2021-11-20 07:32:12,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:32:12,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:12,527 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:12,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:32:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:12,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-20 07:32:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:12,691 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 07:32:13,423 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 07:32:13,495 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:32:13,496 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 07:32:15,539 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:32:15,540 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 07:32:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:15,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:16,584 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 07:32:16,588 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 07:32:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:17,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565106088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:17,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:17,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 63 [2021-11-20 07:32:17,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269070672] [2021-11-20 07:32:17,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:17,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 07:32:17,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 07:32:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3600, Unknown=1, NotChecked=120, Total=3906 [2021-11-20 07:32:17,315 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 63 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 07:32:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:19,184 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-11-20 07:32:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 07:32:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 63 states have internal predecessors, (246), 0 states have call successors, (0), 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 130 [2021-11-20 07:32:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:19,191 INFO L225 Difference]: With dead ends: 238 [2021-11-20 07:32:19,191 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 07:32:19,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=285, Invalid=5267, Unknown=2, NotChecked=146, Total=5700 [2021-11-20 07:32:19,192 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 71 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:19,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1386 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 768 Invalid, 0 Unknown, 347 Unchecked, 0.3s Time] [2021-11-20 07:32:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 07:32:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-11-20 07:32:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 143 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 07:32:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2021-11-20 07:32:19,195 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 130 [2021-11-20 07:32:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:19,195 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2021-11-20 07:32:19,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 63 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 07:32:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2021-11-20 07:32:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 07:32:19,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:19,197 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:19,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:19,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 07:32:19,423 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 07:32:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1046422579, now seen corresponding path program 14 times [2021-11-20 07:32:19,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:19,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341420522] [2021-11-20 07:32:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:19,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:19,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:19,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341420522] [2021-11-20 07:32:19,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341420522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:19,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940531534] [2021-11-20 07:32:19,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:32:19,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:19,947 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:19,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:32:20,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:32:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:20,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 07:32:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:20,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:21,632 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 07:32:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:32:21,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940531534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:21,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:21,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 48 [2021-11-20 07:32:21,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18882923] [2021-11-20 07:32:21,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:21,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:32:21,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:32:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:32:21,803 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 49 states, 48 states have (on average 4.5) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 07:32:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:22,722 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2021-11-20 07:32:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:32:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 4.5) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 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 134 [2021-11-20 07:32:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:22,724 INFO L225 Difference]: With dead ends: 145 [2021-11-20 07:32:22,724 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 07:32:22,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=732, Invalid=3174, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 07:32:22,725 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 422 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:22,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 574 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:32:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 07:32:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-11-20 07:32:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 1.028169014084507) internal successors, (146), 143 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 07:32:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-11-20 07:32:22,729 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 134 [2021-11-20 07:32:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:22,730 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-11-20 07:32:22,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 4.5) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 07:32:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-11-20 07:32:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 07:32:22,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:22,732 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:22,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:22,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:22,959 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 07:32:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1372268030, now seen corresponding path program 15 times [2021-11-20 07:32:22,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559058219] [2021-11-20 07:32:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:22,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 245 proven. 155 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:23,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:23,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559058219] [2021-11-20 07:32:23,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559058219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:23,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459156946] [2021-11-20 07:32:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:32:23,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:23,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:23,392 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:23,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:32:25,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 07:32:25,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-20 07:32:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:25,141 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:32:25,141 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 07:32:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 271 proven. 129 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:26,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 271 proven. 129 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:27,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459156946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:27,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:27,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 60 [2021-11-20 07:32:27,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406411136] [2021-11-20 07:32:27,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:27,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 07:32:27,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 07:32:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=2934, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:32:27,461 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 60 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 07:32:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:28,121 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2021-11-20 07:32:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:32:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 60 states have internal predecessors, (254), 0 states have call successors, (0), 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 140 [2021-11-20 07:32:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:28,123 INFO L225 Difference]: With dead ends: 211 [2021-11-20 07:32:28,123 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 07:32:28,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1091, Invalid=4311, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 07:32:28,124 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:28,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 295 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:32:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 07:32:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-20 07:32:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2021-11-20 07:32:28,128 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 140 [2021-11-20 07:32:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:28,129 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2021-11-20 07:32:28,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 60 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 07:32:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2021-11-20 07:32:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 07:32:28,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:28,131 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:28,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:28,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:28,343 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 07:32:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1239393887, now seen corresponding path program 16 times [2021-11-20 07:32:28,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:28,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876494490] [2021-11-20 07:32:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:28,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 10 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:29,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876494490] [2021-11-20 07:32:29,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876494490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949259620] [2021-11-20 07:32:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:32:29,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:29,211 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:29,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:32:29,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:32:29,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-20 07:32:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:29,421 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:32:29,422 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 07:32:29,436 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 07:32:30,962 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 07:32:31,032 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:32:31,032 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 07:32:33,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:32:33,231 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 50 treesize of output 42 [2021-11-20 07:32:33,241 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-20 07:32:33,241 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 42 treesize of output 28 [2021-11-20 07:32:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 254 proven. 179 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:33,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:36,516 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 66 treesize of output 60 [2021-11-20 07:32:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 10 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949259620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:38,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:38,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 79 [2021-11-20 07:32:38,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026894440] [2021-11-20 07:32:38,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-20 07:32:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-20 07:32:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=5682, Unknown=1, NotChecked=0, Total=6162 [2021-11-20 07:32:38,477 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 79 states, 79 states have (on average 4.10126582278481) internal successors, (324), 79 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:41,150 INFO L93 Difference]: Finished difference Result 256 states and 259 transitions. [2021-11-20 07:32:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:32:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.10126582278481) internal successors, (324), 79 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-20 07:32:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:41,152 INFO L225 Difference]: With dead ends: 256 [2021-11-20 07:32:41,152 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 07:32:41,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1060, Invalid=11821, Unknown=1, NotChecked=0, Total=12882 [2021-11-20 07:32:41,153 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 128 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:41,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1266 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1265 Invalid, 0 Unknown, 145 Unchecked, 0.6s Time] [2021-11-20 07:32:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 07:32:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-11-20 07:32:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 151 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 07:32:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-11-20 07:32:41,157 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 144 [2021-11-20 07:32:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:41,158 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-11-20 07:32:41,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.10126582278481) internal successors, (324), 79 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-11-20 07:32:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 07:32:41,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:41,160 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:41,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:41,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-20 07:32:41,379 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 07:32:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1434036092, now seen corresponding path program 17 times [2021-11-20 07:32:41,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016095039] [2021-11-20 07:32:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:41,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:41,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:41,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016095039] [2021-11-20 07:32:41,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016095039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:41,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567948370] [2021-11-20 07:32:41,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:32:41,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:41,982 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:42,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:32:43,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 07:32:43,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 07:32:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:44,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:44,773 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 07:32:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:32:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567948370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:44,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:44,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 52 [2021-11-20 07:32:44,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755943981] [2021-11-20 07:32:44,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:44,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:32:44,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:32:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2429, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:32:44,967 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 07:32:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:46,120 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-11-20 07:32:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:32:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 0 states have call successors, (0), 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 148 [2021-11-20 07:32:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:46,122 INFO L225 Difference]: With dead ends: 160 [2021-11-20 07:32:46,122 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 07:32:46,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 07:32:46,123 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 579 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:46,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 750 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:32:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 07:32:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-11-20 07:32:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.025974025974026) internal successors, (158), 155 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 07:32:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-11-20 07:32:46,127 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 148 [2021-11-20 07:32:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:46,128 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-11-20 07:32:46,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 07:32:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-11-20 07:32:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 07:32:46,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:46,129 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:46,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:46,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-20 07:32:46,343 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:32:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash -575817443, now seen corresponding path program 11 times [2021-11-20 07:32:46,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:46,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858195986] [2021-11-20 07:32:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:46,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:47,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858195986] [2021-11-20 07:32:47,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858195986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254181255] [2021-11-20 07:32:47,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:32:47,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:47,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:47,755 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:47,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:32:48,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 07:32:48,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 201 conjunts are in the unsatisfiable core [2021-11-20 07:32:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:49,687 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 07:32:50,200 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 07:32:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 423 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:32:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:53,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:32:53,902 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 103 treesize of output 103 [2021-11-20 07:32:53,964 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 40 treesize of output 36 [2021-11-20 07:32:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 423 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:32:54,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254181255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:54,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:54,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31, 39] total 93 [2021-11-20 07:32:54,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863609069] [2021-11-20 07:32:54,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:54,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-20 07:32:54,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-20 07:32:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=8235, Unknown=1, NotChecked=0, Total=8556 [2021-11-20 07:32:54,888 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 93 states, 93 states have (on average 3.3010752688172045) internal successors, (307), 93 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 07:33:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:00,331 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2021-11-20 07:33:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 07:33:00,332 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.3010752688172045) internal successors, (307), 93 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-20 07:33:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:00,333 INFO L225 Difference]: With dead ends: 229 [2021-11-20 07:33:00,333 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 07:33:00,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3301 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=995, Invalid=15774, Unknown=1, NotChecked=0, Total=16770 [2021-11-20 07:33:00,334 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 671 mSDsluCounter, 2277 mSDsCounter, 0 mSdLazyCounter, 5983 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 6460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 5983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:00,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 2323 Invalid, 6460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 5983 Invalid, 0 Unknown, 326 Unchecked, 2.7s Time] [2021-11-20 07:33:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 07:33:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-20 07:33:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 07:33:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-11-20 07:33:00,337 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 150 [2021-11-20 07:33:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:00,338 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-11-20 07:33:00,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.3010752688172045) internal successors, (307), 93 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 07:33:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-11-20 07:33:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 07:33:00,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:00,339 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:00,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:00,555 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:33:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash 134141242, now seen corresponding path program 12 times [2021-11-20 07:33:00,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:00,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842194054] [2021-11-20 07:33:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 120 proven. 370 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:33:01,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842194054] [2021-11-20 07:33:01,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842194054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041559607] [2021-11-20 07:33:01,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:33:01,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:01,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:01,237 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:01,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 07:33:04,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-20 07:33:04,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:33:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-20 07:33:04,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:04,551 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:33:04,551 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 07:33:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 153 proven. 337 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:33:06,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 190 proven. 300 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:33:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041559607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:08,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:08,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2021-11-20 07:33:08,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359053141] [2021-11-20 07:33:08,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:08,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-20 07:33:08,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-20 07:33:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=5207, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 07:33:08,084 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 78 states, 77 states have (on average 4.4935064935064934) internal successors, (346), 78 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 07:33:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:09,851 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-11-20 07:33:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:33:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 4.4935064935064934) internal successors, (346), 78 states have internal predecessors, (346), 0 states have call successors, (0), 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 154 [2021-11-20 07:33:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:09,856 INFO L225 Difference]: With dead ends: 163 [2021-11-20 07:33:09,856 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 07:33:09,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2072, Invalid=8230, Unknown=0, NotChecked=0, Total=10302 [2021-11-20 07:33:09,859 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 282 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:09,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 489 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:33:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 07:33:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-11-20 07:33:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.025) internal successors, (164), 161 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 07:33:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2021-11-20 07:33:09,875 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 154 [2021-11-20 07:33:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:09,875 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2021-11-20 07:33:09,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 4.4935064935064934) internal successors, (346), 78 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 07:33:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2021-11-20 07:33:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 07:33:09,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:09,877 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:09,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:10,087 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 07:33:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1782331352, now seen corresponding path program 18 times [2021-11-20 07:33:10,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30681824] [2021-11-20 07:33:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:10,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 11 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:33:10,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30681824] [2021-11-20 07:33:10,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30681824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810239754] [2021-11-20 07:33:10,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:33:10,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:10,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:10,823 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:10,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 07:33:13,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 07:33:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:33:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-20 07:33:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:14,359 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 07:33:16,222 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 07:33:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 11 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:33:16,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:18,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:33:18,165 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 91 treesize of output 91 [2021-11-20 07:33:18,212 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 36 treesize of output 32 [2021-11-20 07:33:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 11 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:33:18,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810239754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:18,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:18,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 75 [2021-11-20 07:33:18,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765880117] [2021-11-20 07:33:18,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:18,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 07:33:18,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 07:33:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5361, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 07:33:18,597 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 75 states, 75 states have (on average 4.1066666666666665) internal successors, (308), 75 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 07:33:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:24,272 INFO L93 Difference]: Finished difference Result 428 states and 433 transitions. [2021-11-20 07:33:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-20 07:33:24,273 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.1066666666666665) internal successors, (308), 75 states have internal predecessors, (308), 0 states have call successors, (0), 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 07:33:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:24,273 INFO L225 Difference]: With dead ends: 428 [2021-11-20 07:33:24,274 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 07:33:24,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 270 SyntacticMatches, 15 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=617, Invalid=18565, Unknown=0, NotChecked=0, Total=19182 [2021-11-20 07:33:24,275 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 136 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1281 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:24,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2077 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2851 Invalid, 0 Unknown, 1281 Unchecked, 1.2s Time] [2021-11-20 07:33:24,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 07:33:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2021-11-20 07:33:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 169 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 07:33:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2021-11-20 07:33:24,279 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 158 [2021-11-20 07:33:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:24,279 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2021-11-20 07:33:24,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.1066666666666665) internal successors, (308), 75 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 07:33:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2021-11-20 07:33:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 07:33:24,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:24,281 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:24,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:24,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:24,495 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 07:33:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash 918702882, now seen corresponding path program 19 times [2021-11-20 07:33:24,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786360991] [2021-11-20 07:33:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:24,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:25,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786360991] [2021-11-20 07:33:25,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786360991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839254359] [2021-11-20 07:33:25,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:33:25,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:25,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:25,111 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:25,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 07:33:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-20 07:33:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:25,264 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:33:25,264 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 07:33:25,267 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 07:33:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:27,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:29,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839254359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:29,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:29,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2021-11-20 07:33:29,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141483404] [2021-11-20 07:33:29,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:29,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-20 07:33:29,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-20 07:33:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=5421, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 07:33:29,180 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand has 78 states, 77 states have (on average 4.805194805194805) internal successors, (370), 78 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 07:33:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:31,171 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2021-11-20 07:33:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:33:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 4.805194805194805) internal successors, (370), 78 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-20 07:33:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:31,173 INFO L225 Difference]: With dead ends: 178 [2021-11-20 07:33:31,173 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 07:33:31,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1709, Invalid=9003, Unknown=0, NotChecked=0, Total=10712 [2021-11-20 07:33:31,175 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 507 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:31,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 1001 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:33:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 07:33:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2021-11-20 07:33:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 173 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:33:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2021-11-20 07:33:31,179 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 166 [2021-11-20 07:33:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:31,180 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2021-11-20 07:33:31,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 4.805194805194805) internal successors, (370), 78 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 07:33:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2021-11-20 07:33:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 07:33:31,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:31,182 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:31,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:31,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:31,407 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:33:31,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:31,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1889793213, now seen corresponding path program 13 times [2021-11-20 07:33:31,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:31,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570123137] [2021-11-20 07:33:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:31,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 153 proven. 441 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:32,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:32,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570123137] [2021-11-20 07:33:32,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570123137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:32,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471144293] [2021-11-20 07:33:32,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:33:32,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:32,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:32,090 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:32,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 07:33:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-20 07:33:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:32,233 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:33:32,233 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 07:33:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 190 proven. 404 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:34,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 231 proven. 363 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471144293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:36,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:36,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2021-11-20 07:33:36,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784450273] [2021-11-20 07:33:36,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:36,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-20 07:33:36,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-20 07:33:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=810, Invalid=6162, Unknown=0, NotChecked=0, Total=6972 [2021-11-20 07:33:36,109 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 84 states, 83 states have (on average 4.530120481927711) internal successors, (376), 84 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 07:33:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:37,839 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-11-20 07:33:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:33:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.530120481927711) internal successors, (376), 84 states have internal predecessors, (376), 0 states have call successors, (0), 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 168 [2021-11-20 07:33:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:37,841 INFO L225 Difference]: With dead ends: 177 [2021-11-20 07:33:37,841 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 07:33:37,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2134, Invalid=9856, Unknown=0, NotChecked=0, Total=11990 [2021-11-20 07:33:37,842 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 520 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:37,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1034 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:33:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 07:33:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-11-20 07:33:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 175 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 07:33:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2021-11-20 07:33:37,846 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 168 [2021-11-20 07:33:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:37,846 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2021-11-20 07:33:37,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.530120481927711) internal successors, (376), 84 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 07:33:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2021-11-20 07:33:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 07:33:37,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:37,848 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:37,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:38,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:38,063 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 07:33:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 538235313, now seen corresponding path program 20 times [2021-11-20 07:33:38,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:38,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782051984] [2021-11-20 07:33:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:38,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 12 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:38,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782051984] [2021-11-20 07:33:38,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782051984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568321233] [2021-11-20 07:33:38,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:33:38,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:38,929 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:38,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 07:33:39,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:33:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:33:39,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 239 conjunts are in the unsatisfiable core [2021-11-20 07:33:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:39,963 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 07:33:42,947 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 07:33:42,947 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 19 [2021-11-20 07:33:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 12 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:33:42,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:58,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:33:58,983 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 103 treesize of output 103 [2021-11-20 07:33:59,029 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 40 treesize of output 36 [2021-11-20 07:33:59,036 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 7 treesize of output 3 [2021-11-20 07:34:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 12 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:34:00,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568321233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:00,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:00,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 46, 45] total 116 [2021-11-20 07:34:00,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739545256] [2021-11-20 07:34:00,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:00,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-20 07:34:00,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-20 07:34:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=12975, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 07:34:00,401 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 116 states, 116 states have (on average 3.3017241379310347) internal successors, (383), 116 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 07:34:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:07,345 INFO L93 Difference]: Finished difference Result 465 states and 470 transitions. [2021-11-20 07:34:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-20 07:34:07,345 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.3017241379310347) internal successors, (383), 116 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-20 07:34:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:07,346 INFO L225 Difference]: With dead ends: 465 [2021-11-20 07:34:07,346 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 07:34:07,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5305 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=986, Invalid=33424, Unknown=0, NotChecked=0, Total=34410 [2021-11-20 07:34:07,348 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 209 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 5846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1380 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:07,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 3189 Invalid, 5846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4406 Invalid, 0 Unknown, 1380 Unchecked, 1.8s Time] [2021-11-20 07:34:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 07:34:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2021-11-20 07:34:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 1.021978021978022) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 07:34:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-11-20 07:34:07,352 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 172 [2021-11-20 07:34:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:07,353 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-11-20 07:34:07,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.3017241379310347) internal successors, (383), 116 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 07:34:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-11-20 07:34:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 07:34:07,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:07,354 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:07,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:07,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:07,578 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 07:34:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1528166187, now seen corresponding path program 21 times [2021-11-20 07:34:07,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:07,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447027311] [2021-11-20 07:34:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:07,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:08,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:08,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447027311] [2021-11-20 07:34:08,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447027311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:08,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499937864] [2021-11-20 07:34:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:34:08,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:08,275 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:08,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 07:34:12,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-20 07:34:12,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:12,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-20 07:34:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:12,988 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 07:34:12,992 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 07:34:14,149 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 23 treesize of output 19 [2021-11-20 07:34:14,221 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:34:14,221 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 39 treesize of output 38 [2021-11-20 07:34:15,828 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-20 07:34:15,829 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 44 treesize of output 32 [2021-11-20 07:34:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-20 07:34:15,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:17,351 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 31 treesize of output 29 [2021-11-20 07:34:17,362 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 41 treesize of output 37 [2021-11-20 07:34:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-20 07:34:17,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499937864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:17,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8, 7] total 42 [2021-11-20 07:34:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133167245] [2021-11-20 07:34:17,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:17,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 07:34:17,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 07:34:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:34:17,995 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 43 states, 42 states have (on average 4.428571428571429) internal successors, (186), 43 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 07:34:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:20,030 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2021-11-20 07:34:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 07:34:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.428571428571429) internal successors, (186), 43 states have internal predecessors, (186), 0 states have call successors, (0), 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 180 [2021-11-20 07:34:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:20,032 INFO L225 Difference]: With dead ends: 187 [2021-11-20 07:34:20,032 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 07:34:20,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=792, Invalid=6348, Unknown=0, NotChecked=0, Total=7140 [2021-11-20 07:34:20,033 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 77 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:20,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 791 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 539 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2021-11-20 07:34:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 07:34:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-11-20 07:34:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-11-20 07:34:20,037 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2021-11-20 07:34:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:20,037 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-11-20 07:34:20,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.428571428571429) internal successors, (186), 43 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 07:34:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-11-20 07:34:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 07:34:20,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:20,038 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:20,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:20,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:20,239 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:34:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -311109364, now seen corresponding path program 14 times [2021-11-20 07:34:20,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577626679] [2021-11-20 07:34:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:20,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 190 proven. 518 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:21,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:21,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577626679] [2021-11-20 07:34:21,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577626679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:21,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121061699] [2021-11-20 07:34:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:34:21,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:21,146 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:21,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 07:34:21,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:34:21,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-20 07:34:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:21,376 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:34:21,376 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 07:34:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 231 proven. 477 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 276 proven. 432 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:26,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121061699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:26,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:26,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 89 [2021-11-20 07:34:26,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813164583] [2021-11-20 07:34:26,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:26,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-20 07:34:26,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:26,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-20 07:34:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=7084, Unknown=0, NotChecked=0, Total=8010 [2021-11-20 07:34:26,239 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 90 states, 89 states have (on average 4.561797752808989) internal successors, (406), 90 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 07:34:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:28,389 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-11-20 07:34:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:34:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.561797752808989) internal successors, (406), 90 states have internal predecessors, (406), 0 states have call successors, (0), 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 182 [2021-11-20 07:34:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:28,390 INFO L225 Difference]: With dead ends: 190 [2021-11-20 07:34:28,390 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 07:34:28,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4041 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2450, Invalid=11356, Unknown=0, NotChecked=0, Total=13806 [2021-11-20 07:34:28,391 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 416 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:28,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 1113 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:34:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 07:34:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-11-20 07:34:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 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 07:34:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2021-11-20 07:34:28,394 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 182 [2021-11-20 07:34:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:28,395 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2021-11-20 07:34:28,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.561797752808989) internal successors, (406), 90 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 07:34:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2021-11-20 07:34:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-20 07:34:28,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:28,396 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:28,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:28,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:28,597 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:34:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1065960165, now seen corresponding path program 15 times [2021-11-20 07:34:28,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:28,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528100861] [2021-11-20 07:34:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:28,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 446 proven. 337 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:29,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:29,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528100861] [2021-11-20 07:34:29,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528100861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:29,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448491766] [2021-11-20 07:34:29,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:34:29,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:29,321 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 07:34:32,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-20 07:34:32,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:32,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-20 07:34:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:32,775 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:34:32,786 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 07:34:32,789 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 07:34:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 507 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:34,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 507 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:34:36,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448491766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:36,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:36,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 75 [2021-11-20 07:34:36,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554228994] [2021-11-20 07:34:36,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:36,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 07:34:36,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 07:34:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=4547, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 07:34:36,316 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 75 states, 75 states have (on average 4.613333333333333) internal successors, (346), 75 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 07:34:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:37,291 INFO L93 Difference]: Finished difference Result 328 states and 331 transitions. [2021-11-20 07:34:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:34:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.613333333333333) internal successors, (346), 75 states have internal predecessors, (346), 0 states have call successors, (0), 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 188 [2021-11-20 07:34:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:37,292 INFO L225 Difference]: With dead ends: 328 [2021-11-20 07:34:37,292 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 07:34:37,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1649, Invalid=6541, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 07:34:37,293 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 189 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:37,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 488 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:34:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 07:34:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2021-11-20 07:34:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2021-11-20 07:34:37,298 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2021-11-20 07:34:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:37,298 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2021-11-20 07:34:37,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.613333333333333) internal successors, (346), 75 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 07:34:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2021-11-20 07:34:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-20 07:34:37,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:37,300 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:37,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-20 07:34:37,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-20 07:34:37,515 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:34:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1913210552, now seen corresponding path program 16 times [2021-11-20 07:34:37,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:37,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891750340] [2021-11-20 07:34:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:37,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 39 proven. 1069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:39,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:39,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891750340] [2021-11-20 07:34:39,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891750340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:39,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416865653] [2021-11-20 07:34:39,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:34:39,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:39,539 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:39,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 07:34:39,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:34:39,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 219 conjunts are in the unsatisfiable core [2021-11-20 07:34:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:39,802 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:34:39,802 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 07:34:41,824 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 07:34:43,593 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 34 treesize of output 28 [2021-11-20 07:34:43,929 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 07:34:43,929 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 39 treesize of output 24 [2021-11-20 07:34:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 448 proven. 335 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:34:43,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:50,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:50,960 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 109 treesize of output 109 [2021-11-20 07:34:50,986 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 34 treesize of output 32 [2021-11-20 07:34:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 39 proven. 744 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:34:54,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416865653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:54,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:54,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 37, 49] total 130 [2021-11-20 07:34:54,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52419859] [2021-11-20 07:34:54,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:54,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-20 07:34:54,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-20 07:34:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=15826, Unknown=1, NotChecked=0, Total=16770 [2021-11-20 07:34:54,741 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 130 states, 130 states have (on average 3.5615384615384613) internal successors, (463), 130 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 07:35:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:05,117 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2021-11-20 07:35:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-20 07:35:05,118 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.5615384615384613) internal successors, (463), 130 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-20 07:35:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:05,119 INFO L225 Difference]: With dead ends: 284 [2021-11-20 07:35:05,120 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 07:35:05,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8981 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=3735, Invalid=36866, Unknown=1, NotChecked=0, Total=40602 [2021-11-20 07:35:05,123 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1278 mSDsluCounter, 3218 mSDsCounter, 0 mSdLazyCounter, 6297 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 8796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 6297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2278 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:05,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 3274 Invalid, 8796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 6297 Invalid, 0 Unknown, 2278 Unchecked, 3.1s Time] [2021-11-20 07:35:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 07:35:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2021-11-20 07:35:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2021-11-20 07:35:05,128 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 192 [2021-11-20 07:35:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:05,128 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2021-11-20 07:35:05,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.5615384615384613) internal successors, (463), 130 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 07:35:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2021-11-20 07:35:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-20 07:35:05,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:05,130 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:05,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:05,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:05,335 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:35:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash -801501547, now seen corresponding path program 17 times [2021-11-20 07:35:05,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:05,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059673589] [2021-11-20 07:35:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:05,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 231 proven. 601 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:35:06,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:06,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059673589] [2021-11-20 07:35:06,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059673589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:06,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698732560] [2021-11-20 07:35:06,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:35:06,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:06,323 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:06,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 07:35:07,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-20 07:35:07,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-20 07:35:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:07,626 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:35:07,626 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 07:35:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 276 proven. 556 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:35:09,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 325 proven. 507 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:35:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698732560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:12,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 78 [2021-11-20 07:35:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006520772] [2021-11-20 07:35:12,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-20 07:35:12,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:12,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-20 07:35:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=5457, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 07:35:12,047 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 79 states, 78 states have (on average 4.923076923076923) internal successors, (384), 79 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 07:35:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:14,026 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2021-11-20 07:35:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 07:35:14,027 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 4.923076923076923) internal successors, (384), 79 states have internal predecessors, (384), 0 states have call successors, (0), 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 196 [2021-11-20 07:35:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:14,028 INFO L225 Difference]: With dead ends: 204 [2021-11-20 07:35:14,028 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 07:35:14,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2018, Invalid=9754, Unknown=0, NotChecked=0, Total=11772 [2021-11-20 07:35:14,030 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 423 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:14,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1119 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:35:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 07:35:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-20 07:35:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 07:35:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2021-11-20 07:35:14,035 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 196 [2021-11-20 07:35:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:14,035 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2021-11-20 07:35:14,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 4.923076923076923) internal successors, (384), 79 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 07:35:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2021-11-20 07:35:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-20 07:35:14,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:14,037 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:14,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:14,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:14,251 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:35:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1258952732, now seen corresponding path program 18 times [2021-11-20 07:35:14,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767879649] [2021-11-20 07:35:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:14,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 522 proven. 391 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:35:15,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:15,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767879649] [2021-11-20 07:35:15,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767879649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:15,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439085372] [2021-11-20 07:35:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:35:15,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:15,099 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:15,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-20 07:35:24,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-20 07:35:24,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-20 07:35:24,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:24,413 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:35:24,414 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 07:35:24,424 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 07:35:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 423 proven. 490 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:35:27,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 588 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:35:28,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439085372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:28,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:28,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 32] total 81 [2021-11-20 07:35:28,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337592383] [2021-11-20 07:35:28,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:28,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-20 07:35:28,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:28,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-20 07:35:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1015, Invalid=5465, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 07:35:28,639 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 81 states, 81 states have (on average 4.567901234567901) internal successors, (370), 81 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 07:35:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:30,476 INFO L93 Difference]: Finished difference Result 352 states and 355 transitions. [2021-11-20 07:35:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:35:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.567901234567901) internal successors, (370), 81 states have internal predecessors, (370), 0 states have call successors, (0), 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 202 [2021-11-20 07:35:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:30,477 INFO L225 Difference]: With dead ends: 352 [2021-11-20 07:35:30,477 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 07:35:30,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2207, Invalid=10225, Unknown=0, NotChecked=0, Total=12432 [2021-11-20 07:35:30,478 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 158 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:30,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 358 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:35:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 07:35:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2021-11-20 07:35:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2021-11-20 07:35:30,482 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 202 [2021-11-20 07:35:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:30,482 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2021-11-20 07:35:30,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.567901234567901) internal successors, (370), 81 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 07:35:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2021-11-20 07:35:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 07:35:30,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:30,484 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:30,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:30,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-20 07:35:30,695 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:35:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -965420351, now seen corresponding path program 19 times [2021-11-20 07:35:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748694698] [2021-11-20 07:35:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:30,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 42 proven. 1249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:32,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:32,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748694698] [2021-11-20 07:35:32,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748694698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:32,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768917817] [2021-11-20 07:35:32,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:35:32,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:32,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:32,825 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-20 07:35:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 301 conjunts are in the unsatisfiable core [2021-11-20 07:35:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:34,681 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 07:35:35,375 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 07:35:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 42 proven. 1248 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:35:35,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:38,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:35:38,557 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 103 treesize of output 103 [2021-11-20 07:35:38,618 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 40 treesize of output 36 [2021-11-20 07:35:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 42 proven. 871 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:35:39,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768917817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:39,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:39,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 119 [2021-11-20 07:35:39,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521239177] [2021-11-20 07:35:39,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:39,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-20 07:35:39,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:39,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-20 07:35:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=13688, Unknown=0, NotChecked=0, Total=14042 [2021-11-20 07:35:39,332 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 119 states, 119 states have (on average 3.495798319327731) internal successors, (416), 119 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 07:35:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:49,225 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2021-11-20 07:35:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-20 07:35:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.495798319327731) internal successors, (416), 119 states have internal predecessors, (416), 0 states have call successors, (0), 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 206 [2021-11-20 07:35:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:49,226 INFO L225 Difference]: With dead ends: 304 [2021-11-20 07:35:49,227 INFO L226 Difference]: Without dead ends: 217 [2021-11-20 07:35:49,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 356 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4864 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1215, Invalid=26841, Unknown=0, NotChecked=0, Total=28056 [2021-11-20 07:35:49,228 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 877 mSDsluCounter, 4168 mSDsCounter, 0 mSdLazyCounter, 11769 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 4229 SdHoareTripleChecker+Invalid, 12068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 11769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:49,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 4229 Invalid, 12068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 11769 Invalid, 0 Unknown, 112 Unchecked, 5.3s Time] [2021-11-20 07:35:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-20 07:35:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2021-11-20 07:35:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 07:35:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2021-11-20 07:35:49,233 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2021-11-20 07:35:49,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:49,234 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2021-11-20 07:35:49,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.495798319327731) internal successors, (416), 119 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 07:35:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2021-11-20 07:35:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 07:35:49,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:49,236 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:49,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:49,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-20 07:35:49,459 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:35:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -395805730, now seen corresponding path program 20 times [2021-11-20 07:35:49,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246158256] [2021-11-20 07:35:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:49,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 276 proven. 690 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:35:50,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:50,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246158256] [2021-11-20 07:35:50,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246158256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:50,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745660553] [2021-11-20 07:35:50,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:35:50,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:50,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:50,382 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:50,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-20 07:35:50,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:35:50,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-20 07:35:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 325 proven. 641 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:35:51,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:52,811 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 07:35:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 325 proven. 641 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:35:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745660553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:53,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:53,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 71 [2021-11-20 07:35:53,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239819799] [2021-11-20 07:35:53,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:53,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 07:35:53,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 07:35:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=4532, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 07:35:53,056 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 72 states, 71 states have (on average 4.464788732394366) internal successors, (317), 72 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 07:35:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:55,263 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-11-20 07:35:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 07:35:55,264 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.464788732394366) internal successors, (317), 72 states have internal predecessors, (317), 0 states have call successors, (0), 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 210 [2021-11-20 07:35:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:55,265 INFO L225 Difference]: With dead ends: 218 [2021-11-20 07:35:55,265 INFO L226 Difference]: Without dead ends: 218 [2021-11-20 07:35:55,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 381 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2037, Invalid=8675, Unknown=0, NotChecked=0, Total=10712 [2021-11-20 07:35:55,266 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 545 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:55,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1141 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:35:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-20 07:35:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-11-20 07:35:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 07:35:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-11-20 07:35:55,270 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 210 [2021-11-20 07:35:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:55,271 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-11-20 07:35:55,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.464788732394366) internal successors, (317), 72 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 07:35:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-11-20 07:35:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-20 07:35:55,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:55,273 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:55,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:55,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-20 07:35:55,479 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:35:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1887077779, now seen corresponding path program 21 times [2021-11-20 07:35:55,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:55,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689590874] [2021-11-20 07:35:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:55,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 604 proven. 449 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:35:56,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689590874] [2021-11-20 07:35:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689590874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086329238] [2021-11-20 07:35:56,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:35:56,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:56,259 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:56,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-20 07:36:08,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-20 07:36:08,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-20 07:36:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:08,264 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:36:08,265 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 07:36:08,268 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 07:36:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 675 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:36:10,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 675 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:36:12,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086329238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:12,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:12,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 85 [2021-11-20 07:36:12,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486527440] [2021-11-20 07:36:12,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:12,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-20 07:36:12,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-20 07:36:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1288, Invalid=5852, Unknown=0, NotChecked=0, Total=7140 [2021-11-20 07:36:12,216 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 85 states, 85 states have (on average 4.635294117647059) internal successors, (394), 85 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 07:36:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:13,212 INFO L93 Difference]: Finished difference Result 376 states and 379 transitions. [2021-11-20 07:36:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:36:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.635294117647059) internal successors, (394), 85 states have internal predecessors, (394), 0 states have call successors, (0), 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 216 [2021-11-20 07:36:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:13,214 INFO L225 Difference]: With dead ends: 376 [2021-11-20 07:36:13,214 INFO L226 Difference]: Without dead ends: 224 [2021-11-20 07:36:13,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2103, Invalid=8403, Unknown=0, NotChecked=0, Total=10506 [2021-11-20 07:36:13,215 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 173 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:13,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 446 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:36:13,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-20 07:36:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2021-11-20 07:36:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2021-11-20 07:36:13,219 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 216 [2021-11-20 07:36:13,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:13,219 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2021-11-20 07:36:13,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.635294117647059) internal successors, (394), 85 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 07:36:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2021-11-20 07:36:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-20 07:36:13,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:13,221 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:13,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:13,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-20 07:36:13,435 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:36:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash 694134410, now seen corresponding path program 22 times [2021-11-20 07:36:13,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971851939] [2021-11-20 07:36:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:13,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 45 proven. 1443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:15,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:15,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971851939] [2021-11-20 07:36:15,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971851939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:15,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049503878] [2021-11-20 07:36:15,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:36:15,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:15,714 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:15,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-20 07:36:15,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:36:15,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 281 conjunts are in the unsatisfiable core [2021-11-20 07:36:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:15,929 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:36:15,930 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 07:36:18,766 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 07:36:21,025 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 34 treesize of output 28 [2021-11-20 07:36:21,392 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 07:36:21,393 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 39 treesize of output 24 [2021-11-20 07:36:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 606 proven. 881 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:36:21,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:27,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:36:27,886 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 109 treesize of output 109 [2021-11-20 07:36:27,938 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 34 treesize of output 32 [2021-11-20 07:36:27,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:36:27,965 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 52 treesize of output 48 [2021-11-20 07:36:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 45 proven. 1008 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:36:32,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049503878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:32,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:32,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 55, 55] total 160 [2021-11-20 07:36:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266956504] [2021-11-20 07:36:32,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:32,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2021-11-20 07:36:32,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-11-20 07:36:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=24234, Unknown=0, NotChecked=0, Total=25440 [2021-11-20 07:36:32,509 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 160 states, 160 states have (on average 3.66875) internal successors, (587), 160 states have internal predecessors, (587), 0 states have call successors, (0), 0 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 07:36:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:47,402 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2021-11-20 07:36:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-20 07:36:47,403 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 3.66875) internal successors, (587), 160 states have internal predecessors, (587), 0 states have call successors, (0), 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 220 [2021-11-20 07:36:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:47,404 INFO L225 Difference]: With dead ends: 324 [2021-11-20 07:36:47,404 INFO L226 Difference]: Without dead ends: 231 [2021-11-20 07:36:47,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12063 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=4785, Invalid=54021, Unknown=0, NotChecked=0, Total=58806 [2021-11-20 07:36:47,406 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1608 mSDsluCounter, 5008 mSDsCounter, 0 mSdLazyCounter, 10212 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 5072 SdHoareTripleChecker+Invalid, 12929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 10212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2452 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:47,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 5072 Invalid, 12929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 10212 Invalid, 0 Unknown, 2452 Unchecked, 4.9s Time] [2021-11-20 07:36:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-20 07:36:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2021-11-20 07:36:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2021-11-20 07:36:47,411 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 220 [2021-11-20 07:36:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:47,411 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2021-11-20 07:36:47,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 3.66875) internal successors, (587), 160 states have internal predecessors, (587), 0 states have call successors, (0), 0 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 07:36:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2021-11-20 07:36:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-20 07:36:47,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:47,413 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:47,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:47,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-20 07:36:47,627 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:36:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1518924007, now seen corresponding path program 23 times [2021-11-20 07:36:47,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018448853] [2021-11-20 07:36:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:47,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 325 proven. 785 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:36:48,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018448853] [2021-11-20 07:36:48,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018448853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926232374] [2021-11-20 07:36:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:36:48,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:48,808 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:48,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-20 07:36:55,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-20 07:36:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 151 conjunts are in the unsatisfiable core [2021-11-20 07:36:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:55,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:36:55,827 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 07:36:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 378 proven. 732 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:36:58,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 435 proven. 675 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:37:01,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926232374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:01,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:01,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 36] total 108 [2021-11-20 07:37:01,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930540874] [2021-11-20 07:37:01,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:01,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-20 07:37:01,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-20 07:37:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=10495, Unknown=0, NotChecked=0, Total=11772 [2021-11-20 07:37:01,406 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 109 states, 108 states have (on average 4.592592592592593) internal successors, (496), 109 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 07:37:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:04,495 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-11-20 07:37:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 07:37:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 4.592592592592593) internal successors, (496), 109 states have internal predecessors, (496), 0 states have call successors, (0), 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 224 [2021-11-20 07:37:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:04,497 INFO L225 Difference]: With dead ends: 232 [2021-11-20 07:37:04,497 INFO L226 Difference]: Without dead ends: 232 [2021-11-20 07:37:04,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6119 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3519, Invalid=16787, Unknown=0, NotChecked=0, Total=20306 [2021-11-20 07:37:04,498 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 924 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 3642 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 3831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:04,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1619 Invalid, 3831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3642 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:37:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-20 07:37:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-20 07:37:04,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 07:37:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-11-20 07:37:04,525 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 224 [2021-11-20 07:37:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:04,526 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-11-20 07:37:04,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 4.592592592592593) internal successors, (496), 109 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 07:37:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-11-20 07:37:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-20 07:37:04,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:04,528 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:04,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:04,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:04,736 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:37:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:04,737 INFO L85 PathProgramCache]: Analyzing trace with hash -19774282, now seen corresponding path program 24 times [2021-11-20 07:37:04,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:04,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467825145] [2021-11-20 07:37:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:04,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 692 proven. 511 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:37:05,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467825145] [2021-11-20 07:37:05,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467825145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562728743] [2021-11-20 07:37:05,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:37:05,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:05,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:05,814 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:05,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-20 07:37:37,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-20 07:37:37,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 203 conjunts are in the unsatisfiable core [2021-11-20 07:37:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:37,407 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:37:37,407 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 07:37:41,336 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 07:37:44,288 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-11-20 07:37:44,289 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 25 [2021-11-20 07:37:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 32 proven. 1606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:44,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:46,178 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 37 treesize of output 31 [2021-11-20 07:37:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 48 proven. 1590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:52,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562728743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:52,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:52,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 57, 57] total 147 [2021-11-20 07:37:52,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853192608] [2021-11-20 07:37:52,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:52,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-20 07:37:52,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-20 07:37:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2239, Invalid=19223, Unknown=0, NotChecked=0, Total=21462 [2021-11-20 07:37:52,313 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 147 states, 147 states have (on average 4.224489795918367) internal successors, (621), 147 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 07:37:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:56,799 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2021-11-20 07:37:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-20 07:37:56,799 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 4.224489795918367) internal successors, (621), 147 states have internal predecessors, (621), 0 states have call successors, (0), 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 07:37:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:56,800 INFO L225 Difference]: With dead ends: 507 [2021-11-20 07:37:56,800 INFO L226 Difference]: Without dead ends: 238 [2021-11-20 07:37:56,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11398 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3777, Invalid=30263, Unknown=0, NotChecked=0, Total=34040 [2021-11-20 07:37:56,802 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 712 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:56,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 2457 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2928 Invalid, 0 Unknown, 224 Unchecked, 1.5s Time] [2021-11-20 07:37:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-20 07:37:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2021-11-20 07:37:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 07:37:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2021-11-20 07:37:56,810 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 230 [2021-11-20 07:37:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:56,810 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2021-11-20 07:37:56,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 4.224489795918367) internal successors, (621), 147 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 07:37:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2021-11-20 07:37:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 07:37:56,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:56,812 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:56,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:57,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-20 07:37:57,047 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:37:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 927627795, now seen corresponding path program 25 times [2021-11-20 07:37:57,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:57,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026051024] [2021-11-20 07:37:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:57,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 48 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:59,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026051024] [2021-11-20 07:37:59,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026051024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648793231] [2021-11-20 07:37:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:37:59,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:59,679 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:59,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-20 07:37:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:59,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 341 conjunts are in the unsatisfiable core [2021-11-20 07:37:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:01,831 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 07:38:02,573 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 07:38:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 48 proven. 1650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:02,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:06,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:38:06,443 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 103 treesize of output 103 [2021-11-20 07:38:06,504 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 40 treesize of output 36 [2021-11-20 07:38:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 48 proven. 1155 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:07,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648793231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:07,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:07,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 133 [2021-11-20 07:38:07,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925987715] [2021-11-20 07:38:07,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:07,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-20 07:38:07,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-20 07:38:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=17162, Unknown=0, NotChecked=0, Total=17556 [2021-11-20 07:38:07,100 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 133 states, 133 states have (on average 3.5488721804511276) internal successors, (472), 133 states have internal predecessors, (472), 0 states have call successors, (0), 0 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 07:38:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:19,639 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2021-11-20 07:38:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-20 07:38:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.5488721804511276) internal successors, (472), 133 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-20 07:38:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:19,640 INFO L225 Difference]: With dead ends: 344 [2021-11-20 07:38:19,640 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 07:38:19,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 406 SyntacticMatches, 4 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1395, Invalid=33761, Unknown=0, NotChecked=0, Total=35156 [2021-11-20 07:38:19,642 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 672 mSDsluCounter, 5645 mSDsCounter, 0 mSdLazyCounter, 15525 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 5714 SdHoareTripleChecker+Invalid, 15951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 15525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:19,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 5714 Invalid, 15951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 15525 Invalid, 0 Unknown, 280 Unchecked, 6.8s Time] [2021-11-20 07:38:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 07:38:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2021-11-20 07:38:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 07:38:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2021-11-20 07:38:19,646 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 234 [2021-11-20 07:38:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:19,646 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2021-11-20 07:38:19,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.5488721804511276) internal successors, (472), 133 states have internal predecessors, (472), 0 states have call successors, (0), 0 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 07:38:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2021-11-20 07:38:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-20 07:38:19,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:19,648 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:19,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:19,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:19,863 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:38:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash -269468240, now seen corresponding path program 26 times [2021-11-20 07:38:19,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230621159] [2021-11-20 07:38:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:19,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 378 proven. 886 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:21,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230621159] [2021-11-20 07:38:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230621159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086962312] [2021-11-20 07:38:21,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:38:21,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:21,146 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:21,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-20 07:38:21,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:38:21,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 161 conjunts are in the unsatisfiable core [2021-11-20 07:38:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:21,338 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:38:21,339 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 07:38:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 435 proven. 829 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:24,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 496 proven. 768 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:27,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086962312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:27,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:27,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 113 [2021-11-20 07:38:27,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280625888] [2021-11-20 07:38:27,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:27,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-20 07:38:27,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-20 07:38:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1470, Invalid=11412, Unknown=0, NotChecked=0, Total=12882 [2021-11-20 07:38:27,784 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 114 states, 113 states have (on average 4.654867256637168) internal successors, (526), 114 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 07:38:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:30,788 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2021-11-20 07:38:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 07:38:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 4.654867256637168) internal successors, (526), 114 states have internal predecessors, (526), 0 states have call successors, (0), 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 238 [2021-11-20 07:38:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:30,790 INFO L225 Difference]: With dead ends: 246 [2021-11-20 07:38:30,790 INFO L226 Difference]: Without dead ends: 246 [2021-11-20 07:38:30,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6709 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3934, Invalid=18416, Unknown=0, NotChecked=0, Total=22350 [2021-11-20 07:38:30,792 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1081 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 3793 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:30,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 1726 Invalid, 4008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3793 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:38:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-20 07:38:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-20 07:38:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 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 07:38:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-11-20 07:38:30,796 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2021-11-20 07:38:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:30,796 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-11-20 07:38:30,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 4.654867256637168) internal successors, (526), 114 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 07:38:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-11-20 07:38:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-20 07:38:30,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:30,798 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:30,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:31,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:31,012 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:38:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1923803457, now seen corresponding path program 27 times [2021-11-20 07:38:31,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226593863] [2021-11-20 07:38:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:31,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 786 proven. 577 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:31,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226593863] [2021-11-20 07:38:31,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226593863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541516907] [2021-11-20 07:38:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:38:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:31,954 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:31,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-20 07:38:49,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-20 07:38:49,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-20 07:38:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:49,971 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:38:49,972 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 07:38:49,975 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 07:38:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 867 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:52,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 867 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:38:54,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541516907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:54,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:54,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 95 [2021-11-20 07:38:54,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643673832] [2021-11-20 07:38:54,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:54,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-20 07:38:54,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-20 07:38:54,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1609, Invalid=7321, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 07:38:54,765 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 95 states, 95 states have (on average 4.652631578947369) internal successors, (442), 95 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 07:38:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:55,876 INFO L93 Difference]: Finished difference Result 424 states and 427 transitions. [2021-11-20 07:38:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:38:55,877 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 4.652631578947369) internal successors, (442), 95 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 244 [2021-11-20 07:38:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:55,878 INFO L225 Difference]: With dead ends: 424 [2021-11-20 07:38:55,878 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 07:38:55,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2613, Invalid=10497, Unknown=0, NotChecked=0, Total=13110 [2021-11-20 07:38:55,880 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 197 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:55,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 325 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:38:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 07:38:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-11-20 07:38:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 07:38:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2021-11-20 07:38:55,885 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 244 [2021-11-20 07:38:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:55,885 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2021-11-20 07:38:55,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 4.652631578947369) internal successors, (442), 95 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 07:38:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2021-11-20 07:38:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-20 07:38:55,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:55,887 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:55,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:56,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-20 07:38:56,103 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:38:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1518197412, now seen corresponding path program 28 times [2021-11-20 07:38:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:56,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337731783] [2021-11-20 07:38:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:56,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 51 proven. 1873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:59,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:59,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337731783] [2021-11-20 07:38:59,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337731783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:59,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282157072] [2021-11-20 07:38:59,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:38:59,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:59,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:59,135 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:59,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-20 07:38:59,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:38:59,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 313 conjunts are in the unsatisfiable core [2021-11-20 07:38:59,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:59,372 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:38:59,373 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 07:39:02,953 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 07:39:05,773 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 34 treesize of output 28 [2021-11-20 07:39:06,192 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 07:39:06,193 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 39 treesize of output 24 [2021-11-20 07:39:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 788 proven. 1135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:39:06,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:14,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:39:14,718 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 109 treesize of output 109 [2021-11-20 07:39:14,801 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 34 treesize of output 32 [2021-11-20 07:39:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 51 proven. 1312 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-20 07:39:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282157072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:20,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:39:20,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 61, 61] total 178 [2021-11-20 07:39:20,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806123314] [2021-11-20 07:39:20,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:20,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2021-11-20 07:39:20,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:20,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-11-20 07:39:20,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=30046, Unknown=0, NotChecked=0, Total=31506 [2021-11-20 07:39:20,026 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 178 states, 178 states have (on average 3.7247191011235956) internal successors, (663), 178 states have internal predecessors, (663), 0 states have call successors, (0), 0 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 07:39:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:37,991 INFO L93 Difference]: Finished difference Result 364 states and 366 transitions. [2021-11-20 07:39:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-20 07:39:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.7247191011235956) internal successors, (663), 178 states have internal predecessors, (663), 0 states have call successors, (0), 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 248 [2021-11-20 07:39:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:37,993 INFO L225 Difference]: With dead ends: 364 [2021-11-20 07:39:37,994 INFO L226 Difference]: Without dead ends: 259 [2021-11-20 07:39:37,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 427 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15092 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=5807, Invalid=67363, Unknown=0, NotChecked=0, Total=73170 [2021-11-20 07:39:37,999 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1496 mSDsluCounter, 5964 mSDsCounter, 0 mSdLazyCounter, 12658 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 6036 SdHoareTripleChecker+Invalid, 14433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 12658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1514 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:37,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 6036 Invalid, 14433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 12658 Invalid, 0 Unknown, 1514 Unchecked, 5.9s Time] [2021-11-20 07:39:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-20 07:39:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 253. [2021-11-20 07:39:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 07:39:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2021-11-20 07:39:38,004 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 248 [2021-11-20 07:39:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:38,004 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2021-11-20 07:39:38,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.7247191011235956) internal successors, (663), 178 states have internal predecessors, (663), 0 states have call successors, (0), 0 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 07:39:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2021-11-20 07:39:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-20 07:39:38,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:38,007 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:38,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:38,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:38,235 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 07:39:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash 129970745, now seen corresponding path program 29 times [2021-11-20 07:39:38,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344434603] [2021-11-20 07:39:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:38,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 435 proven. 993 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-20 07:39:39,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344434603] [2021-11-20 07:39:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344434603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395949286] [2021-11-20 07:39:39,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:39:39,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:39,310 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:39,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24460c2d-d20b-48b6-a9a3-b60e19adc48c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-20 07:39:46,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-20 07:39:46,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:39:46,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 174 conjunts are in the unsatisfiable core [2021-11-20 07:39:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:46,247 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:39:46,247 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 07:39:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 496 proven. 932 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-20 07:39:48,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 561 proven. 867 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-20 07:39:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395949286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:52,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:39:52,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 98 [2021-11-20 07:39:52,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039931265] [2021-11-20 07:39:52,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:52,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-20 07:39:52,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:52,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-20 07:39:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=8623, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 07:39:52,427 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 99 states, 98 states have (on average 4.979591836734694) internal successors, (488), 99 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)